Gasket

ABSTRACT

In order to provide a gasket which has a good handling property as a gasket used for a fuel battery or a gasket for an HDD, can be easily integrated with the other end mounting member even in the case that the other end mounting member such as a separator or the like is a material having low strength or a thin plate, and has good mounting workability, a gasket is having a sheet-shaped gasket mounting member provided with a sticking function on one face, and a gasket main body made of a rubber-type elastic member integrated with the sheet-shaped gasket mounting member, and the gasket is mounted to the other end mounting member on the basis of the sticking function of the sheet-shaped gasket mounting member.

TECHNICAL FIELD

[0001] The present invention relates to a gasket corresponding to one ofsealing apparatuses, and more particular, to a gasket suitable for beingused as a gasket for a fuel battery, a gasket for a top cover in a harddisc drive (HDD) or the like.

BACKGROUND OF THE INVENTION

[0002] For example, as a fuel battery gasket used in a fuel batterycell, there has been conventionally known a gasket of a gasketelementary substance type, a separator integral type or a reactionelectrode portion (MEA) integral type, and each is attached to apredetermined position of a cell, thereby sealing a sealed fluid such asa fuel gas, an oxidizer gas,. a refrigerant or the like.

[0003] However, these conventional arts have the followingdisadvantages.

[0004] That is, first, in the case that the gasket is used in the fuelbattery cell, it is necessary to seal an outer periphery of a reactionsurface completely. However, since a face of a board to be sealed iswide, a handling property is not so good in the case of the gasket ofthe elementary substance type. Further, in the case that the cells arelaminated so as to assembly a fuel battery stack, a handling property,and consequently assembling workability is not so good. This is becausethe gasket tends to be deformed at a time of being handled due to asmall cross sectional shape and thinness of the gasket in comparisonwith a size of the gasket.

[0005] Further, in the case that the gasket is of the integral type,there can be considered a printing method in accordance with an integralforming, and a post-bonding method. The printing method in accordancewith the integral forming is structured such as to integrally form agasket (a gasket main body) 101 directly on the other end mountingmember 102 such as a separator, a reaction electrode portion or the likeas shown in FIG. 33, and the post-bonding method is structured such asto mount the gasket (the gasket main body) 101 previously formed in aproduct shape independently to the other end mounting member 102 byusing an adhesive agent 103 as shown in FIG. 34. In these cases, theassembling workability mentioned above can be improved, however, thereis a possibility that the separator, the reaction electrode portion orthe like is injured due to a pressure, a temperature or the like at atime of integrally forming, and in the case of the post-bonding, thehandling property at a time of the bonding work is not so good, and itis hard to stably apply the adhesive agent.

[0006] Further, in the case that a material of the separator is a lowstrength material such as a carbon or the like, it is necessary toemploy a forming technique under a low pressure so as to prevent theseparator from being cracked due to a mold clamping force, a moldingpressure or the like at a time of integrally forming the gasket.Further, since it is impossible to strongly press the separator by themold, a lot of molding burrs are generated.

[0007] Further, since the structure is made such that one stack isformed by laminating a plurality of cells, it is necessary to make theparts constituting the cells thin with taking space saving intoconsideration, and it is necessary to make the separator thin for thatpurpose. In this case, in order to achieve the thinness by the integralforming, there is a limit in view of strength of the separator.

[0008] The present invention is made by taking the points mentionedabove into consideration, and an object of the present invention is toprovide a gasket which has a good handling property as a gasket used asa gasket for a fuel battery or a gasket for a HDD, can be easilyintegrated with the other end mounting member even in the case that theother end mounting member such as a separator or the like is a materialhaving low strength or a thin plate, and-has good mounting workability.

DISCLOSURE OF THE INVENTION

[0009] In order to achieve the object mentioned above, in accordancewith a first aspect of the present invention, there is provided a gasketcomprising:

[0010] a sheet-shaped gasket mounting member provided with a stickingfunction on one face; and

[0011] a gasket main body made of a rubber-type elastic materialintegrated with the sheet-shaped gasket mounting member,

[0012] wherein the gasket is mounted to the other end mounting member onthe basis of the sticking function of the sheet-shaped gasket mountingmember.

[0013] Further, in accordance with a second aspect of the presentinvention, there is provided a gasket as recited in the first aspectmentioned above, wherein the gasket main body is integrally formed onanother face of the sheet-shaped gasket mounting member by using anadhesive agent.

[0014] Still further, in accordance with a third aspect of the presentinvention, there is provided a gasket as recited in the first aspectmentioned above, wherein the gasket main body is made of an adhesiverubber, and is integrally formed on another face of the sheet-shapedgasket mounting member by using an adhesive property thereof.

[0015] Still further, in accordance with a fourth aspect of the presentinvention, there is provided a gasket as recited in the first aspectmentioned above, wherein the gasket main body is integrally formed onboth faces of an end portion of the sheet-shaped gasket mounting memberby using an adhesive agent.

[0016] Still further, in accordance with a fifth aspect of the presentinvention, there is provided a gasket as recited in the first aspectmentioned above, wherein the gasket main body is made of an adhesiverubber, and is integrally formed on both faces of an end portion of thesheet-shaped gasket mounting member by using an adhesive propertythereof.

[0017] Still further, in accordance with a sixth aspect of the presentinvention, there is provided a gasket as recited in the fourth or fifthaspect mentioned above, wherein the adhesive agent is attached to oneface of the sheet-shaped gasket mounting member, a mold releasing filmis releasably attached to one face, and a portion for peeling the moldreleasing film at a time of the mounting work is provided all around theperiphery of the gasket main body.

[0018] Still further, in accordance with a seventh aspect of the presentinvention, there is provided a gasket as recited in the fourth or fifthaspect mentioned above, wherein the adhesive agent is attached to oneface of the sheet-shaped gasket mounting member, a mold releasing filmis releasably attached to one face, and a portion for peeling the moldreleasing film at a time of the mounting work is provided in parts onthe periphery of the gasket main body.

[0019] Still further, in accordance with an eighth aspect of the presentinvention, there is provided a gasket comprising:

[0020] a gasket main body made only of a rubber; and

[0021] a sheet-shaped gasket mounting member provided in parts on aperiphery of the gasket main body,

[0022] wherein the gasket is mounted to the other end mounting member onthe basis of a sticking function provided on one face of thesheet-shaped gasket mounting member.

[0023] Still further, in accordance with a ninth aspect of the presentinvention, there is provided a gasket as recited in the eighth aspectmentioned above, wherein a cross sectional shape of the gasket main bodyis an O-ring shape.

[0024] Still further, in accordance with a tenth aspect of the presentinvention, there is provided a gasket as recited in the eighth aspectmentioned above, wherein a cross sectional shape of the gasket main bodyis a lip shape.

[0025] Still further, in accordance with an eleventh aspect of thepresent invention, there is provided a gasket as recited in any one ofthe first to tenth aspect mentioned above, wherein the gasket main bodyis both-face gasket main body arranged on both faces of the other endmounting member, the sheet-shaped gasket mounting member is integrallyformed in the gasket main body, and the gasket is bent to be double at atime of being mounted to the other end mounting member so as to be stuckto both faces of the other end mounting member.

[0026] Still further, in accordance with a twelfth aspect of the presentinvention, there is provided a gasket as recited in the eleventh aspectmentioned above, wherein the sheet-shaped gasket mounting memberintegrally has a portion stuck to one face side of the other endmounting member, a portion stuck to another face side, and a connectionportion obtained by connecting the both portions, and is bent in theconnection portion at a time of being mounted.

[0027] Still furhter, in accordance with a thirteenth aspect of thepresent invention, there is provided a gasket as recited in the twelfthaspect mentioned above, wherein the connection portion is provided witha bending position specifying portion such as a slit, a perforated lineor the like for facilitating the bending of the connection portion.

[0028] Still further, in accordance with a fourteenth aspect of thepresent invention, there is provided a gasket as recited in any one ofthe first to thirteenth aspect mentioned above, wherein the other endmounting member is a separator for a fuel battery.

[0029] Still further, in accordance with a fifteenth aspect of thepresent invention, there is provided a gasket as recited in any one ofthe first to thirteenth aspect mentioned above, wherein the other endmounting member is a reaction electrode portion for a fuel battery, oran electrolyte membrane corresponding to a component part of thereaction electrode portion.

[0030] Still further, in accordance with a sixteenth aspect of thepresent invention, there is provided a gasket as recited in any one ofthe first to thirteenth aspect mentioned above, wherein the other endmounting member is a top cover for a HDD.

[0031] Still further, in accordance with a seventeenth aspect of thepresent invention, there is provided a gasket as recited in any one ofthe first to seventh aspect mentioned above, wherein the gasket is stuckto each of both faces of an electrolyte membrane for a fuel battery, andtwo or more seal lips are provided in each of the gaskets.

[0032] Still further, in accordance with an eighteenth aspect of thepresent invention, there is provided a gasket as recited in any one ofthe first to seventh aspect mentioned above, wherein the gasket is stuckto each of both faces of an electrolyte membrane for a fuel battery, andeach of the gaskets is formed in a squeeze shape having no seal lip.

[0033] Still further, in accordance with a nineteenth aspect of thepresent invention, there is provided a gasket as recited in any one ofthe first to seventh aspect mentioned above, wherein the gasket is stuckto each of both faces of an electrolyte membrane for a fuel battery, oneor more seal lips are provided in one gasket, and another gasket isformed in a squeeze shape having no seal lip.

[0034] Still further, in accordance with a twentieth aspect of thepresent invention, there is provided a gasket as recited in any one ofthe first to seventh aspect mentioned above, wherein the gasket is stuckto each of both faces of an electrolyte membrane for a fuel battery, oneseal lip is provided in one gasket, and two or more seal lips areprovided in another gasket.

[0035] In the gasket in accordance with the first aspect of the presentinvention provided with the structure mentioned above, since theintegrated product constituted by the sheet-shaped gasket mountingmember provided with the sticking function on one face and the gasketmain body made of the rubber-like elastic material is formed, the formersheet-shaped gasket mounting member serves as an effect of reinforcingthe latter gasket main body, so that it is possible to restrict thedeformation of the whole of the gasket comparatively small at a time ofhandling. In order to secure this function, it is suitable that thesheet-shaped gasket mounting member employs a sheet-shaped member suchas a resin film, a metal film, a woven fabric, a non woven fabric or thelike, in which elongation is small in normal handling. Further, in thegasket having the structure mentioned above, since the gasket main bodyis integrated with the sheet-shaped gasket mounting member and is laterbonded to the other end mounting member via the sheet-shaped gasketmounting member, it is not necessary to attach the other end mountingmember to the molding die at a time of molding the gasket main body.Accordingly, since there is no risk that any crack or the like isgenerated even in the case that the other end mounting member is thematerial having a low strength or a thin plate, it is possible to easilyintegrate the other end mounting member with the gasket. Further, in thecase that the sheet-shaped gasket mounting member attached to themolding die in place of the other end mounting member is, for example, aresin film, since there is no risk that the crack or the like isgenerated in this sheet-shaped gasket mounting member, it is possible toset the mold clamping force large, so that it is possible to inhibit alot of molding burrs from being generated. Further, since the structureis made such that the gasket is mounted to the other end mounting memberon the basis of the sticking function provided on one face of thesheet-shaped gasket mounting member, it is possible to mount the gasketto the other end mounting member in accordance with a simple work ofonly positioning and pressing the gasket. The other end mounting memberis, for example, the separator for the fuel battery (the fourteenthaspect), the reaction electrode portion for the fuel battery or theelectrolyte membrane as the component part thereof (the fifteenthaspect) or the top cover for the HDD (the sixteenth aspect) whereby itis possible to manufacture the gasket of the separator integrated type,the reaction electrode portion or electrolyte membrane integrated typeor the top cover integrated type. In this case, the reaction electrodeportion means a reaction electrode, an electrolyte membrane and a MEAintegrated by the reaction electrode and the electrolyte membrane, andthe reaction electrode portion and the like mean a cell component partof the fuel battery such as gas diffusion layer, a separator, a coolingplate and the like, in addition to the elements mentioned above. Theelectrolyte membrane may be sometimes called as an ion exchangemembrane.

[0036] Further, in the gasket in accordance with the second aspect ofthe present invention provided with the structure mentioned above, sincethe gasket main body is integrally formed on another face of thesheet-shaped gasket mounting member by using the adhesive agent, thesheet-shaped gasket mounting member also serves as the effect ofreinforcing the gasket main body, so that it is possible to restrict thedeformation of the whole of the gasket comparatively small at a time ofhandling. Further, since the gasket main body is integrated with thesheet-shaped gasket mounting member and is later bonded to the other endmounting member via the sheet-shaped gasket mounting member, it is notnecessary to attach the other end mounting member to the molding die ata time of molding the gasket main body. Accordingly, since there is norisk that any crack or the like is generated even in the case that theother end mounting member is a material having low strength or a thinplate, it is possible to easily integrate the other end mounting memberwith the gasket. Further, in the case that the sheet-shaped gasketmounting member attached to the molding die in place of the other endmounting member is, for example, a resin film, since there is no riskthat the crack or the like is generated in this sheet-shaped gasketmounting member, it is possible to set the mold clamping force large, sothat it is possible to inhibit a lot of molding burrs from beinggenerated. In this case, in order to integrally form the gasket mainbody on another face of the sheet-shaped gasket mounting member by usingthe adhesive agent, there are a method of forming the gasket main bodyin a state of attaching the sheet-shaped gasket mounting member havingthe adhesive agent applied thereto to the molding die for forming thegasket main body, thereby integrating both the elements at the same timewhen the forming is finished, and a method of independently forming thegasket main body in the product shape and thereafter bonding the gasketmain body to the sheet-shaped gasket mounting member by using theadhesive agent.

[0037] Further, in the gasket in accordance with the third aspect of thepresent invention provided with the structure mentioned above, since themain body is made of the adhesive rubber and is integrally formed onanother face of the sheet-shaped gasket mounting member by using theadhesive property of the adhesive rubber, the sheet-shaped gasketmounting member also serves as the effect of reinforcing the gasket mainbody, so that it is possible to restrict the deformation of the whole ofthe gasket comparatively small at a time of handling. Further, since thegasket main body is integrated with the sheet-shaped gasket mountingmember and is later bonded to the other end mounting member via thesheet-shaped gasket mounting member, it is not necessary to attach theother end mounting member to the molding die at a time of molding thegasket main body. Accordingly, since there is no risk that any crack orthe like is generated even in the case that the other end mountingmember is a material having low strength or a thin plate, it is possibleto easily integrate the other end mounting member with the gasket.Further, in the case that the sheet-shaped gasket mounting memberattached to the molding die in place of the other end mounting memberis, for example, a resin film, since there is no risk that the crack orthe like is generated in this sheet-shaped gasket mounting member, it ispossible to set the mold clamping force large, so that it is possible toinhibit a lot of molding burrs from being generated. The gasket mainbody made of the adhesive rubber is bonded to the sheet-shaped gasketmounting member due to the adhesive property without using the adhesiveagent.

[0038] Further, in the gasket in accordance with the fourth aspect ofthe present invention provided with the structure mentioned above, sincethe gasket main body is integrally formed on both faces of the endportion of the sheet-shaped gasket mounting member by using the adhesiveagent, the sheet-shaped gasket mounting member also serves as the effectof reinforcing the gasket main body, so that it is possible to restrictthe deformation of the whole of the gasket comparatively small at a timeof handling. Further, since the gasket main body is integrated with thesheet-shaped gasket mounting member and is later bonded to the other endmounting member via the sheet-shaped gasket mounting member, it is notnecessary to attach the other end mounting member to the molding die ata time of molding the gasket main body. Accordingly, since there is norisk that any crack or the like is generated even in the case that theother end mounting member is a material having low strength or a thinplate, it is possible to easily integrate the other end mounting memberwith the gasket. Further, in the case that the sheet-shaped gasketmounting member attached to the molding die in place of the other endmounting member is, for example, a resin film, since there is no riskthat the crack or the like is generated in this sheet-shaped gasketmounting member, it is possible to set the mold clamping force large, sothat it is possible to inhibit a lot of molding burrs from beinggenerated. Further, since the gasket main body is integrally formed onboth faces of the end portion of the sheet-shaped gasket mountingmember, the both-face gasket is formed, and the gasket main body is indirect contact with the other end mounting member, so that it ispossible to securely seal between the gasket and the other end mountingmember. In this case, in order to integrally form the gasket main bodyon both faces of the end portion of the sheet-shaped gasket mountingmember by using the adhesive agent, there are a method of forming thegasket main body in a state of attaching the sheet-shaped gasketmounting member having the adhesive agent applied thereto to the moldingdie for forming the gasket main body, thereby integrating both theelements at the same time when the forming is finished, and a method ofindependently forming the gasket main body in the product shape andthereafter bonding the gasket main body to the sheet-shaped gasketmounting member by using the adhesive agent.

[0039] Further, in the gasket in accordance with the fifth aspect of thepresent invention provided with the structure mentioned above, since themain body is made of the adhesive rubber and is integrally formed onboth faces of the end portion of the sheet-shaped gasket mounting memberby using the adhesive property of the adhesive rubber, the sheet-shapedgasket mounting member also serves as the effect of reinforcing thegasket main body, so that it is possible to restrict the deformation ofthe whole of the gasket comparatively small at a time of handling.Further, since the gasket main body is integrated with the sheet-shapedgasket mounting member and is later bonded to the other end mountingmember via the sheet-shaped gasket mounting member, it is not necessaryto attach the other end mounting member to the molding die at a time ofmolding the gasket main body. Accordingly, since there is no risk thatany crack or the like is generated even in the case that the other endmounting member is a material having low strength or a thin plate, it ispossible to easily integrate the other end mounting member with thegasket. Further, in the case that the sheet-shaped gasket mountingmember attached to the molding die in place of the other end mountingmember is, for example, a resin film, since there is no risk that thecrack or the like is generated in this sheet-shaped gasket mountingmember, it is possible to set the mold clamping force large, so that itis possible to inhibit a lot of molding burrs from being generated.Further, since the gasket main body is integrally formed on both facesof the end portion of the sheet-shaped gasket mounting member, theboth-face gasket is formed, and the gasket main body is in directcontact with the other end mounting member, so that it is possible tosecurely seal between the gasket and the other end mounting member. Thegasket main body made of the adhesive rubber is bonded to thesheet-shaped gasket mounting member due to the adhesive property withoutusing the adhesive agent.

[0040] Further, in the gasket in accordance with the sixth aspect of thepresent invention provided with the structure mentioned above, since theadhesive agent is attached to one face of the sheet-shaped gasketmounting member and the mold releasing film is releasably attached tothe one face, it is possible to protect the adhesive agent by the moldreleasing film before the mounting work of the gasket, and it ispossible to mount the gasket to the other end mounting member inaccordance with a simple work obtained only by for peeling the moldreleasing film and positioning and pressing the gasket, at a time of themounting work. The portion peeling the mold releasing film at a time ofthe mounting work is provided all around the periphery of the gasket,however, in the case that a necessary adhesive force is secured evenwhen the adhesive area is small, this portion may be provided in someparts on the periphery of the gasket (the seventh aspect).

[0041] Further, in the gasket in accordance with the eighth aspect ofthe present invention provided with the structure mentioned above, sincethe integral product of the rubber-only gasket main body and thesheet-shaped gasket mounting member provided in some parts on theperiphery of the gasket main body is formed, and the sheet-shaped gasketmounting member is provided with the sticking function on one facethereof, it is possible to mount the gasket to the other end mountingmember in accordance with the simple work obtained only by positioningand pressing the gasket, at a time of the mounting work of the gasket.As a cross sectional shape of the gasket main body of the rubber-onlytype, the O-ring shape (the ninth aspect) or the lip shape (the tenthaspect) is preferable. In accordance with these shapes, it is possibleto form the both-face gasket, so that it is possible to securely sealbetween the gasket and the other end mounting member.

[0042] In this case, in conjunction with the inventions in accordancewith the first to seventh aspects, the following technical matters areincluded in the present application.

[0043] That is, in order to achieve the object mentioned above, onegasket proposed by the present application is provided with thefollowing contents.

[0044] (1) A gasket for sealing a fuel gas and an oxidizer gas betweenan MEA and a separator which are used for a fuel battery or a gasket forsealing a refrigerant between the separators, in which the gasket isintegrated with the separator by integrally forming an adhesive rubberdirectly on a resin film in which an adhesive agent (an adhesivecompound) is applied to one face. Or a gasket for sealing a sealingfluid such as a fuel gas or an oxidizer gas between an MEA and aseparator which are used for a fuel battery or a gasket for sealing thesealing fluid such as a refrigerant between the separators, in which thegasket is integrated with the other end mounting member such as theseparator by integrally forming an adhesive rubber directly on asheet-shaped gasket mounting member such as a resin film in which anadhesive agent (an adhesive compound) is applied to one face.

[0045] (2) A gasket for sealing a fuel gas and an oxidizer gas betweenan MEA and a separator which are used for a fuel battery or a gasket forsealing a refrigerant between the separators, in which the gasket isformed by integrally forming a rubber on another face of a resin film inwhich an adhesive agent (an adhesive compound) is applied to one face,by using an adhesive agent, or integrally forming an adhesive rubberdirectly. Or a gasket for sealing a sealing fluid such as a fuel gas oran oxidizer gas between an MEA and a separator which are used for a fuelbattery or a gasket for sealing the sealing fluid such as a refrigerantbetween the separators, in which the gasket is formed by integrallyforming a rubber on another face of a sheet-shaped gasket mountingmember such as a resin film in which an adhesive agent (an adhesivecompound) is applied to one face, by using an adhesive agent, orintegrally forming an adhesive rubber directly.

[0046] (3) A separator integrated type gasket in which the gasket inaccordance with the item (1) or (2) mentioned above is integrated withthe separator by using an adhesive agent (an adhesive compound) of afilm. Or a gasket in which the gasket in accordance with the item (1) or(2) mentioned above is integrated with the separator by using anadhesive agent (an adhesive compound) of a sheet-shaped gasket mountingmember such as a film.

[0047] (4) An MEA integrated type gasket in which the gasket inaccordance with the item (1) or (2) mentioned above is integrated withthe MEA by using an adhesive agent (an adhesive compound) of a film. Ora gasket in which the gasket in accordance with the item (1) or (2)mentioned above is integrated with the MEA by using an adhesive agent(an adhesive compound) of a sheet-shaped gasket mounting member such asa film.

[0048] (5) As a mode for carrying out the invention in accordance withthe items (1) to (4) mentioned above, in order to solve the problem inthe conventional art, there is provided a separator integrated type orMEA integrated type gasket formed by applying an adhesive agent (anadhesive compound) such as a silicone adhesive agent (a siliconeadhesive compound) onto one face of a resin film such as a polyethyleneterephthalate, a polyethylene naphthalate or a polyimide, and integrallyforming a rubber by applying an adhesive agent to a back side of theadhesive agent (adhesive compound) applied surface, or integrallyforming an adhesive rubber directly, and thereafter sticking a resinfilm to the separator or the MEA. In the case that the gasket isintegrally formed via the adhesive agent, the gasket employs a materialconstituted by a silicone rubber, a fluorine rubber, a nitrile rubber, abutyl rubber, an EPDM or the like. Further, a material of the adhesiverubber which can be directly bonded to the resin film is not limited,however, for example, in the case of the silicone rubber material,X-34-1277A/B (trade name) produced by Shinetsu Chemical Co., Ltd. or thelike is preferably used. A resin film which can bear with about 100 to200° C. corresponding to a temperature at which the rubber mentionedabove can be formed is selected as the resin film, and a film havingthickness between 10 and 500 μm, preferably, between 50 and 150 μm isused. As the resin film, a generalized film of a polyethyleneterephthalate, a polyethylene naphthalate, a polyimide, an ester, anamide, an imide or the like can be used, and for example, in the case ofthe polyethylene terephthalate, a Dialami 100μ (trade name) produced byMitsubishi Resin Co., Ltd. or the like is preferably used. At a time offorming the gasket, the film cut in a sheet shape or a seal shape isclamped by the molds and injection molded. In the case that the film isformed in the sheet shape, it is necessary to cut in the seal shapeafter molding, and in the case that the film is formed in the sealshape, it is necessary that a presser margin of a metal mold is providedin the periphery of the seal lip portion. The adhesive agent (theadhesive compound) is set to the silicone type, and thickness ofapplication is set not more than 100 μm, preferably between 10 and 15μm. The resin film and the separator are integrated by the adhesiveagent (the adhesive compound) in accordance with a thermo compressionbonding. As the adhesive agent (the adhesive compound), for example, TSR1512 (trade name) produced by Toshiba Silicone Co., Ltd. or the like canbe preferably used.

[0049] (6) Further, in accordance with the items (1) to (5) mentionedabove, the following operations and effects can be achieved.

[0050] That is, first, since the gasket is integrated or later bondedvia the sheet-shaped gasket mounting member such as the resin film orthe like, it is possible to easily integrate the gasket with the otherend mounting member such as the separator (a brittle material, a thinproduct) having low strength which has been conventionally hard to beintegrally formed. Further, since the gasket is integrally formed withthe sheet-shaped gasket mounting member such as the resin film or thelike in place of the separator, and the sheet-shaped gasket mountingmember such as the resin film or the like does not have the possibilityof being broken as in the separator, it is possible to make the moldclamping force high, whereby it is possible to inhibit a lot of burrsfrom being generated at a time of molding. Still further, since thesheet-shaped gasket mounting member such as the resin film or the likeserves as the reinforcing member, a handling property is good, and sincethe adhesive agent (the adhesive compound) is attached to thesheet-shaped gasket mounting member such as the resin film or the like,it is possible to omit a step of applying the adhesive agent (theadhesive compound), whereby it is possible to achieve to stabilize aquality. The results of check tests of an adhesive property (a stickingproperty) with respect to the separator or the MEA carried out by theinventors of the present application, are shown in FIG. 1.

[0051] Further, in conjunction with the inventions in accordance withthe first to seventh aspects, the following technical matters areincluded in the present application.

[0052] That is, in order to achieve the object mentioned above, onegasket proposed by the present application is provided with thefollowing contents.

[0053] (7) A gasket structured such that a seal surface is positioned onboth faces of a film having a structure constituted by three layerscomprising a resin film, an adhesive agent (an adhesive compound) and amold releasing film, in which the gasket is formed in a shape completelycovering one side end face of the three-layer film, and the three-layerfilm is exposed in a portion close to an opposite side end face. Or, agasket structured such that a seal surface is positioned on both facesof a film having a structure constituted by three layers comprising asheet-shaped gasket mounting member such as a resin film, an adhesiveagent (an adhesive compound) and a mold releasing film, in which thegasket is formed in a shape completely covering one side end face of thethree-layer film, and the three-layer film is exposed in a portion closeto an opposite side end face.

[0054] (8) A gasket structured such that a seal surface is positioned onboth faces of a film having a structure constituted by three layerscomprising a resin film, an adhesive agent (an adhesive compound) and amold releasing film, in which the gasket is formed in a shape completelycovering one side end face of the three-layer film, and a portion closeto an opposite side end face is formed in a shape in which thethree-layer film is exposed, and the adhesive agent (the adhesivecompound) can be exposed by peeling the mold releasing film only in aportion close to the end face in which the three-layer film is exposed.Or, a gasket structured such that a seal surface is positioned on bothfaces of a film having a structure constituted by three layerscomprising a sheet-shaped gasket mounting member such as a resin film,an adhesive agent (an adhesive compound) and a mold releasing film, inwhich the gasket is formed in a shape completely covering one side endface of the three-layer film, and a portion close to an opposite sideend face is formed in a shape in which the three-layer film is exposed,and the adhesive agent (the adhesive compound) can be exposed by peelingthe mold releasing film only in a portion close to the end face in whichthe three-layer film is exposed.

[0055] (9) An integral product of a separator for a fuel battery and agasket manufactured by sticking the gasket in accordance with the item(7) or (8) mentioned above to the separator for the fuel battery. Or, anintegral product of the other end mounting member such as a separatorfor a fuel battery and a gasket manufactured by sticking the gasket inaccordance with the item (7) or (8) mentioned above to the other endmounting member such as the separator for the fuel battery.

[0056] (10) A gasket in which the end face which is not covered with therubber of the three-layer film in accordance with the item (7) or (8)mentioned above is all the periphery (is arranged in all the periphery)of the gasket.

[0057] (11) A gasket in which the end face which is not covered with therubber of the three-layer film in accordance with the item (7) or (8)mentioned above is not all the periphery (is not arranged in all theperiphery) of the gasket, that is, the portion in which the adhesiveagent is exposed is dispersed on the periphery of the gasket.

[0058] (12) The products in the five items mentioned above include aproduct used in an HDD.

[0059] (13) An integrated product of a separator for a fuel battery anda gasket structured such that a rubber is formed so as to cover one sideend face of a film having a structure constituted by three layerscomprising a resin film, an adhesive agent (an adhesive compound) and amold releasing film, in which the mold releasing film is partly peeledin a portion close to an opposite side end face so as to be stuck to theseparator. Or, an integrated product of the other end mounting membersuch as a separator for a fuel battery and a gasket structured such thata rubber is formed so as to cover one side end face of a film having astructure constituted by three layers comprising a sheet-shaped gasketmounting member such as a resin film, an adhesive agent (an adhesivecompound) and a mold releasing film, in which the mold releasing film ispartly peeled in a portion close to an opposite side end face so as tobe stuck to the other end mounting member such as the separator.

[0060] (14) As a mode for carrying out the invention in accordance withthe items (7) to (13) mentioned above, there is manufactured a gasketstructured such that a seal surface is positioned on both faces of afilm having a structure constituted by three layers comprising a resinfilm, an adhesive agent (an adhesive compound) and a mold releasingfilm, in which the gasket is formed in a shape completely covering oneside end face of the three-layer film, and an opposite side end face isformed in a shape in which the three-layer film is exposed. Anintegrated product of the separator for the fuel battery and the gasketis completed by peeling the mold releasing film in the portion close tothe end face in which the three-layer film is exposed so as to exposethe adhesive agent (the adhesive compound), and sticking to theseparator by utilizing the adhesive agent (the adhesive compound).Further, there are two cases comprising a case that the end face inwhich the three-layer film is not covered with the rubber is all theperiphery of the gasket, and a case that it is dispersed on theperiphery of the gasket. A material of the film employs PET, PI, PEN orthe like. The rubber preferably employs an adhesive material whichreacts to the resin film at a time of vulcanizing so as to be chemicallybonded, and may employ a liquid rubber or a solid rubber.

[0061] (15) Further, in accordance with the items (7) to (14) mentionedabove, it is possible to provide the gasket which gives a high sealingproperty without depending on the material or the surface roughness ofthe other end mounting member such as the separator or the like, and itis possible to provide a product by which the difficulty at a time ofassembling the gasket in the other end mounting member such as theseparator or the like can be solved.

[0062] Further, in conjunction with the inventions in accordance withthe eighth aspect to the tenth aspect mentioned above, the followingtechnical matters are included in the present application.

[0063] (16) A gasket used for a fuel battery, the gasket being a resinfilm integrated type gasket structured such that a film constituted bythree layers comprising a resin film, an adhesive agent (an adhesivecompound) and a mold releasing film is integrated in a part of arubber-only portion, in which a cross sectional shape of the gasket isan O-ring shape. Or, a gasket used for a fuel battery or the like, thegasket being structured such that a film constituted by three layerscomprising a sheet-shaped gasket mounting member such as a resin film,an adhesive agent (an adhesive compound) and a mold releasing film isintegrated in a part of a rubber-only portion, in which a crosssectional shape of the gasket is an O-ring shape

[0064] (17) A gasket used for a fuel battery, the gasket being a resinfilm integrated type gasket structured such that a film constituted bythree layers comprising a resin film, an adhesive agent (an adhesivecompound) and a mold releasing film is integrated in a part of arubber-only portion, in which a cross sectional shape of the gasket is alip shape. Or, a gasket used for a fuel battery or the like, the gasketbeing structured such that a film constituted by three layers comprisinga sheet-shaped gasket mounting member such as a resin film, an adhesiveagent (an adhesive compound) and a mold releasing film is integrated ina part of a rubber-only portion, in which a cross sectional shape of thegasket is a lip shape.

[0065] (18) An integrated product in which the product in accordancewith the item (16) or (17) mentioned above is stuck to the other endmounting member such as an electrolyte membrane for the fuel battery.

[0066] (19) An integrated product in which the product in accordancewith the item (16) or (17) mentioned above is stuck to a separator forthe fuel battery.

[0067] (20) The gasket having the structure mentioned above is also usedas a gasket for an HDD.

[0068] (21) An integrated type gasket for a fuel battery, in which afilm constituted by three layers comprising a resin film, an adhesiveagent (an adhesive compound) and a mold releasing film is inserted to apart of a rubber-only gasket, and only a part of the mold releasing filmmentioned above is peeled. Or, a gasket in which a film constituted bythree layers comprising a sheet-shaped gasket mounting member such as aresin film, an adhesive agent (an adhesive compound) and a moldreleasing film is inserted to a part of a rubber-only gasket, and only apart of the mold releasing film mentioned above is peeled.

[0069] (22) A separator integrated type gasket for a fuel battery or anelectrolyte membrane integrated type gasket for a fuel battery, in whicha film constituted by three layers comprising a resin film, an adhesiveagent (an adhesive compound) and a mold releasing film is inserted to apart of a rubber-only gasket, only a part of the mold releasing filmmentioned above is peeled, and the portion in which the mold releasingfilm is peeled is stuck to a separator or an electrolyte. Or, a gasketstructured such that a film constituted by three layers comprising asheet-shaped gasket mounting member such as a resin film, an adhesiveagent (an adhesive compound) and a mold releasing film is inserted to apart of a rubber-only gasket, only a part of the mold releasing filmmentioned above is peeled, and the portion in which the mold releasingfilm is peeled is stuck to a separator or an electrolyte.

[0070] (23) As a mode for carrying out the invention in accordance withthe items (16) to (22) mentioned above, a film constituted by threelayers comprising a resin film, an adhesive agent (an adhesive compound)and a mold releasing film is inserted to a part of a rubber-only gasket.The gasket preferably employs silicone rubber, EPDM, fluorine rubber orthe like as a material, and a hardness of the gasket is preferably setto Hs20 to 70. The cross sectional shape of the gasket may be designedby taking into consideration a reaction force condition or the fluid tobe sealed and a pressure of the rubber, for example, a circular shape, alip shape of the like is employed. PET, PEN, PI or the like is employedfor the resin film, and it is preferable that a thickness of the resinfilm is between 50 μm and 100 μm. The adhesive agent (the adhesivecompound) is applied to one face of the film, and this one face isprotected by the mold releasing film. The three-layer structure film isinserted to some positions on a gasket layout within the metal mold at atime of molding the rubber so as to be integrally formed. Since a maincross section of the gasket is formed only by the rubber, a sealingproperty and a compression set are not deteriorated by the resin filmbeing inserted. At a time of assembling the fuel battery, since theadhesive agent (the adhesive compound) is exposed by peeling the moldreleasing film in the three-layer film, it is possible to stick and fixto some positions on the separator or the electrolyte membrane. Inaccordance with this structure, a handling at a time of assembling thegasket is improved.

[0071] (24) Further, in accordance with the structure of the items (16)to (23) mentioned above, the following effects can be obtained. That is,since the sticking portion and the gasket portion are separated, it ispossible to improve a sealing performance, and since the stickingportion is provided partly in some positions in place of all the surfaceof the gasket, the sticking work can be easily carried out, and it isunnecessary to apply the adhesive agent (the adhesive compound) at atime of integrating the gasket with the other end mounting member suchas the separator or the like.

[0072] Further, in the gasket in accordance with the eleventh aspect ofthe present invention provided with the structure mentioned above, thereis provided the gasket as recited in any one of the first to tenthaspect mentioned above, wherein the gasket is provided with a gasketmain body for the arranged on both faces of the other end mountingmember, and the sheet-shaped gasket mounting member which is integrallyformed in the gasket main body on both faces, and the gasket is bent intwo at a time of being mounted to the other end mounting member so as tobe stuck to both faces of the other end mounting member. Accordingly, itis possible to manufacture and handle the gasket by combining actuallytwo gaskets required on both faces of the other end mounting member intoone. In this case, it is preferable that the sheet-shaped gasketmounting member integrally has a portion stuck to one face side of theother end mounting member, a portion stuck to another face side, and aconnection portion connecting the both portions, and is manufactured soas to be bent in the connection portion at a time of being mounted (thetwelfth aspect). Further, the connection portion is provided with abending position specifying portion such as a slit, a perforated line orthe like in order to facilitate the bending of the connection portion(the thirteenth aspect).

[0073] In this case, in conjunction with the invention in accordancewith the eleventh to thirteenth aspects mentioned above, the followingtechnical matters are included in the present application.

[0074] (25) A resin film integrated type gasket used in a fuel battery,in which a gasket for two portions to be stuck onto both faces of anelectrolyte membrane on one sheet of resin film is integrally formedwith the resin film. Or, a gasket of a type of a sheet-shaped gasketmounting member such as a resin film being integrated, used in a fuelbattery, in which a gasket for two portions to be stuck onto both facesof the other end mounting member such as an electrolyte membrane on onesheet of sheet-shaped gasket mounting member such as the sheet-shapegasket mounting member is integrally formed with the resin film.

[0075] (26) An integrated product in accordance with the item (25)mentioned above, in which the adhesive agent (the adhesive compound) isapplied to an opposite face of the resin film on which the gasket is notformed. Or, an integrated product in accordance with the item (25)mentioned above, in which the adhesive agent (the adhesive compound) isapplied to an opposite face of the sheet-shaped gasket mounting membersuch as the resin film on which the gasket is not formed.

[0076] (27) An integrated product in accordance with the item (25) or(26) mentioned above, in which the gasket is integrated with the resinfilm by an adhesive rubber. Or, an integrated product in accordance withthe item (25) or (26) mentioned above, in which the gasket is integratedwith the sheet-shaped gasket mounting member such as the resin film byan adhesive rubber. Or, an integrated product in accordance with theitem (25) or (26) mentioned above, in which the gasket is formed by anadhesive rubber, and is integrated with the sheet-shaped gasket mountingmember such as the resin film by an adhesive property thereof.

[0077] (28) An integrated product in accordance with the item (25) or(26) mentioned above, in which an adhesive agent is previously appliedto the resin film for forming the gasket thereon, and the rubber isintegrated with the resin film via the adhesive agent. Or, an integratedproduct in accordance with the item (25) or (26) mentioned above, inwhich an adhesive agent is previously applied to the sheet-shaped gasketmounting member such as the resin film for forming the gasket, and therubber is integrated with the sheet-shaped gasket mounting member viathe adhesive agent.

[0078] (29) An integrated product, in which the gasket in accordancewith any one of the item (25) to (28) mentioned above is formed inaccordance with an injection molding method, a dispenser method and aprinting method.

[0079] (30) An integrated product of an electrolyte membrane and agasket, in which the integrated product in accordance with any one ofthe items (25) to (28) mentioned above is stuck to the electrolytemembrane. Or, an integrated product of the other end mounting member anda gasket, in which the integrated product in accordance with anyone ofthe items (25) to (28) mentioned above is stuck to the other endmounting member such as an electrolyte membrane.

[0080] (31) An integrated product structured such that a gasket isformed on a resin film, in which the gasket is a resin film integratedtype gasket for being stuck on both faces of an electrolyte membrane,and the gasket for both faces is formed on one sheet of resin film. Anintegrated product of an electrolyte membrane and a gasket, in which anadhesive agent (an adhesive compound) is applied to the opposite side ofthe resin film, and the gasket is integrated with the electrolytemembrane via the adhesive agent. Or, an integrated product structuredsuch that a gasket is formed on a sheet-shaped gasket mounting membersuch as a resin film, in which the gasket is of a type that thesheet-shaped gasket mounting member such as the resin film is integratedfor being stuck on both faces of the other end mounting member such asan electrolyte membrane, and the gasket for both faces is formed on onesheet of sheet-shaped gasket mounting member such as the resin film. Anintegrated product of the other end mounting member and a gasket, inwhich an adhesive agent (an adhesive compound) is applied to theopposite side of the sheet-shaped gasket mounting member such as theresin film, and the gasket is integrated with the other end mountingmember such as the electrolyte membrane via the adhesive agent.

[0081] (32) As a mode for carrying out the invention in accordance withthe items (25) to (31) mentioned above, the gasket is formed on theopposite face of the resin film to which the adhesive agent (theadhesive compound) is applied. The method of manufacturing the gasketcomprises the injection molding, the dispenser or the printing. Therubber to be used is integrated with the resin film by using the rubbermaterial having a selective adhesive property. In the case that theselective adhesive rubber is not used, the adhesive agent is previouslyapplied to the surface of the resin film on which the gasket is formed.The resin film integrated type gasket to be stuck to both faces of theelectrolyte membrane is obtained by forming the gasket for both faces onone large resin film at one time. Thereafter, the resin film is punchedinto the shape to be used. When the gasket is integrated with theelectrolyte membrane, one sheet of resin film integrated gasket is bentin two so as to be stuck to both faces of the electrolyte membrane. Itis possible to improve a flexibility by forming the shallow cut line inthe bent portion of the resin film. The rubber material used for thegasket mainly employs silicone rubber, EPDM or fluorine rubber. Theresin film employs the film in which the adhesive agent is applied toone face of PET, PEN or PI. The thickness thereof is between 0.03 to 0.3mm.

[0082] (33) Further, in accordance with the structure mentioned above,the following operations and effects can be achieved.

[0083] That is, in the integrated product of the other end mountingmember and the gasket, obtained by sticking the integral product of thesheet-shaped gasket mounting member such as the resin film and thegasket in which the gasket is formed on the sheet-shaped gasket mountingmember such as the resin film, to the other end mounting member such asthe electrolyte membrane, it is necessary to stick the gasket to bothfaces of the other end mounting member such as the electrolyte membrane.Accordingly, in this case, it is necessary to prepare two kinds ofgaskets for both faces. However, since two gaskets required for bothfaces of the other end mounting member such as the electrolyte membraneare combined into one piece, it is possible to widely reduce a number ofman-hour and a cost for manufacturing.

[0084] Further, in the gasket in accordance with the seventeenth aspectto the twentieth aspect of the present invention provided with thestructure mentioned above, in addition to the structure that the gasketis stuck to both faces of the electrolyte membrane for the fuel battery,the structure is made such that “two or more seal lips are provided ineach of the gaskets” (the seventeenth aspect), “each of the gaskets isformed in the squeeze shape having no seal lip” (the eighteenth aspect),“one or more seal lip is provided in one gasket, and another gasket isformed in the squeeze shape having no seal lip” (the nineteenth aspect),or “one or more seal lip is provided in one gasket, and two or more seallips are provided in another gasket” (the twentieth aspect). This isbecause of the following reasons.

[0085] That is, when the gasket main body is directly formed on theelectrolyte membrane of the fuel battery as mentioned above, there is arisk of such a damage as the electrolyte membrane is deformed due to anevaporation of the water content caused by the heat of the molding die,because the electrolyte membrane contains the water. Accordingly, theinventors of the present application have considered a method of formingthe gasket main body on the resin film in which the adhesive agent isapplied to the face having no gasket main body formed, and sticking theintegral product of the resin film and the gasket main body to theelectrolyte membrane by the adhesive agent, in place of the above directforming.

[0086] In this case, in the gasket main body, it is important in view ofa system of the fuel battery to make a height of the gasket main bodylow in a state that the gasket main body is collapsed after being set.Since the fuel battery is formed by laminating a lot of fuel batteryelementary units called as cells, it is necessary to make a reactionforce of the gasket main body small. Further, in order to make thereaction force small, it is important to make a collapsing amount of thegasket main body small. That is, a shape having a small height isrequired for the gasket main body before being set. Further, on theother hand, it is required for the gasket main body to make a peaksurface pressure high, in order to seal the gas within the fuel batteryeven when the height of the gasket main body is reduced. Further, inorder to make the peak surface pressure of the gasket main body high, itis considered that the seal lip is provided in the gasket main body.

[0087] However, in this case, as in FIG. 35 shown as a comparativeembodiment, in an integrated product of an electrolyte membrane 104 anda gasket main body 105 in which the resin film integrated type gasketmain body 105 is stuck to both faces of the electrolyte membrane 104 fora fuel battery, in the case that one seal lip 106 is provided in each ofthe gaskets 105 on both faces, a computed value can not be obtained at atime when positions of the seal lips 106 are displaces on both thefaces. Accordingly, there is a possibility that the peak value of thesurface pressure becomes small. When the peak value of the surfacepressure is small, a safety ratio of gas leak is lowered. Therefore, inthe case that the seal lip 106 is provided in each of the gasket mainbody 105 on both the faces, it is necessary to precisely align thepositions of the seal lips 106 on both the faces. Further, in order toprecisely align the positions the seal lips 106 on both the faces, it isnecessary to precisely align positions to be stuck of the resin films107. However, a precise jig is required for the purpose of preciselyalign the sticking positions of the resin films 107 on both the faces asmentioned above, and a work therefor is very troublesome.

[0088] On the contrary, the inventions in accordance with theseventeenth aspect to the twentieth aspect mentioned above propose thegasket shape in which the fear that the peak value of the surfacepressure is reduced is not generated even when the sticking positions ofthe sheet-shaped gasket mounting member (the resin films or the like) onboth the faces are displaced slightly, taking the above points intoconsideration. In order to achieve this, there is employed thestructures as mentioned above, that is, “two or more seal lips areprovided in each of the gaskets” (the seventeenth aspect) “each of thegaskets is formed in the squeeze shape having no seal lip” (theeighteenth aspect), “one or more seal lip is provided in one gasket, andanother gasket is formed in the squeeze shape having no seal lip” (thenineteenth aspect), or “one or more seal lip is provided in one gasket,and two or more seal lips are provided in another gasket” (the twentiethaspect). In accordance with these structures, it is possible to preventthe surface pressure peak of the gasket from being reduced even when thepositions of both the faces are displaced slightly.

[0089] In this case, in conjunction with the inventions in accordancewith the seventeenth aspect to the twentieth aspect, the followingtechnical matters are included in the present application.

[0090] That is, in order to achieve the object mentioned above, onegasket proposed by the present application is provided with thefollowing contents.

[0091] (34) A shape of an integrated product of an electrolyte membraneand a gasket formed by sticking a resin film integrated type gasket toboth faces of the electrolyte membrane for a fuel battery, in which twoor more seal lips are provided in the gaskets on both the faces. Thegasket shape is symmetrical on both the faces with respect to theelectrolyte membrane. Since two or more seal lips are provided, it ispossible to deal with even in the case that the positions of the gasketsare displaced on both the faces.

[0092] (35) A shape of an integrated product of an electrolyte membraneand a gasket formed by sticking a resin film integrated type gasket toboth faces of the electrolyte membrane for a fuel battery, in which noseal lip is provided in the gaskets on both the faces. The gasket shapeis symmetrical on both the faces with respect to the electrolytemembrane. Since no seal lip is provided, it is necessary to be formed ina gentle angular shape so as to make the surface pressure peak large.Since no seal lip is provided, it is possible to deal with even in thecase that the positions are displaced slightly on both the faces.

[0093] (36) A shape of an integrated product of an electrolyte membraneand a gasket formed by sticking a resin film integrated type gasket toboth faces of the electrolyte membrane for a fuel battery, in which oneor more seal lip is provided in the gasket on one face, and no seal lipis provided in the gasket on another face. The gasket shape isasymmetrical with respect to the electrolyte membrane. Since the seallip is provided on one face, it is not necessary to worry about thedisplacement of seal lip positions on both the faces.

[0094] (37) A shape of an integrated product of an electrolyte membraneand a gasket formed by sticking a resin film integrated type gasket toboth faces of the electrolyte membrane for a fuel battery, in which oneseal lip is provided in the gasket on one face, and two or more seallips are provided in the gasket on another face. The gasket shape isasymmetrical with respect to the electrolyte membrane. Since two or moreseal lips are provided on one face, it is possible to deal with.

[0095] (38) Further, in accordance with these shapes, even if thepositions of both the faces are slightly displaced at a time of stickingthe gasket integrated type resin film on both the faces of theelectrolyte membrane, it is possible to prevent the surface pressurepeak of the gasket from being reduced.

[0096] Further, the gasket in accordance with the present invention canbe suitably utilized in the gasket for HDD as well as the gasket for thefuel battery.

[0097] For example, the HDD is structured such that a hard disccorresponding to a main body of a recording portion, a drive motor, areading mechanism, a cooling part and the like are housed in a narrowcasing. In the gasket for the HDD, in accordance with a requirement ofdownsizing in the HDD and diversification in the casing shape, a thinshape and a sealing property of a surface having a complex shape arerequired. Accordingly, in the case of attaching an extremely thin gasketor a gasket having an irregular shape, there is a disadvantage that anassembling property is not so good. Further, there is easily generated aportion which is partly extended, after having been attached, a portionwhich is slacked, and a portion which is twisted, and the gasket may bedeformed at a time when the manufactured gaskets are piled up untilbeing attached or at a time of being transported. Therefore, there is adisadvantage that an carefulness should be paid to handing the gasket inorder to secure the sealing performance of the gasket. In accordancewith the present invention, it is possible to deal with thesedisadvantages.

[0098] In this case, with respect to the matter that the gasket inaccordance with the present invention is used for the HDD, the followingtechnical matters are included in the present application.

[0099] That is, in order to achieve the object mentioned above, onegasket proposed by the present application is provided with thefollowing contents.

[0100] (39) A gasket for an HDD top cover, in which the gasket is stuckto the HDD top cover by integrally forming a rubber to another face of aresin film in which an adhesive agent (an adhesive compound) is appliedto one face by using an adhesive agent, or integrally forming anadhesive rubber directly thereto. Or, a gasket for an HDD top cover, inwhich the gasket is stuck to the HDD top cover by integrally forming arubber to another face of a sheet-shaped gasket mounting member such asa resin film in which an adhesive agent (an adhesive compound) isapplied to one face by using an adhesive agent, or integrally forming anadhesive rubber directly thereto.

[0101] (40) In order to solve the problems in the prior art, a gasketfor an HDD top cover, in which the gasket is integrated by applying anadhesive agent (an adhesive compound) of an acrylic type or a siliconetype to one face of a resin film made of polyethylene terephthalate,polyethylene naphthalate or polyimide, integrally forming a rubber onback side of a surface to which the adhesive agent (the adhesivecompound) is applied, via an adhesive agent or integrally forming anadhesive rubber directly, and thereafter sticking the resin film to atop cover base material. Or, in order to solve the problems in the priorart, a gasket for an HDD top cover, in which the gasket is integrated byapplying an adhesive agent (an adhesive compound) of an acrylic type ora silicone type to one face of a sheet-shaped gasket mounting membersuch as a resin film made of PET, PEN or PI, integrally forming a rubberon the back side of a surface to which the adhesive agent (the adhesivecompound) is applied, via an adhesive agent or integrally forming anadhesive rubber directly, and thereafter sticking the sheet-shapedgasket mounting member such as the resin film to a top cover basematerial.

[0102] (41) As a mode for carrying out the invention in accordance withthe items (39) to (40) mentioned above, in the case that the gasket isintegrally formed via the adhesive agent, the gasket employs a materialsuch as silicone rubber, fluorine rubber, nitrile rubber, butyl rubber,EPDM or the like. Further, a material of the adhesive rubber which canbe directly bonded to the resin film is not limited. A resin film whichcan bear with about 100 to 200° C. corresponding to a temperature atwhich the rubber mentioned above can be formed is selected as the resinfilm, and the film having a thickness of 10 to 500 μm, preferably, 50 to150 μm is used. As the resin film, a generalized film of polyethyleneterephthalate, polyethylene naphthalate, polyimide, ester, amide, imideor the like can be used, for example, in the case of polyethyleneterephthalate, Dialami 100μ (trade name) produced by Mitsubishi ResinCo., Ltd. or the like is used. At a time of forming the gasket, theresin film cut in a sheet shape or a seal shape is clamped by the moldsand the rubber is molded. In the case that the film is formed in thesheet shape, it is necessary to cut in the seal shape after molding, andin the case that the film is formed in the seal shape, it is necessarythat a presser margin for a metal mold is provided in the periphery ofthe seal lip portion. The adhesive agent (the adhesive compound) is setto the acrylic type or the silicone type, and a thickness of applicationis set not more than 100μm, preferably 10 to 15 μm. The resin film andthe top cover base material are integrated by the present adhesive agentin accordance with a thermo compression bonding.

[0103] (42) Further, in accordance with the structure of the items (39)to (41) mentioned above, the following operations and effects can beachieved.

[0104] That is, since the sheet-shaped gasket mounting member such asthe resin film or the like serves as the reinforcing member, a handlingproperty is good, and a workability at a time of later bonding isimproved, and since the adhesive agent (the adhesive compound) isattached to the sheet-shaped gasket mounting member such as the resinfilm or the like, it is possible to omit a step of applying the adhesiveagent (the adhesive compound) to the gasket elementary substance,whereby it is possible to stabilize a quality, and a capital investmentfor evenly applying the adhesive agent (the adhesive compound) is notrequired. Further, since the gasket is integrally formed and laterbonded via the sheet-shaped gasket mounting member such as the resinfilm, it is possible to easily achieve the integration between alaminated damping steel sheet and the gasket which have beenconventionally hard to be integrally formed due to melting out of aninner thermoplastic resin on the basis of the heat and the pressure.Further, since the gasket is integrally formed with the sheet-shapedgasket mounting member such as the resin film, it is not necessary toapply a work for integrating such as a through hole to the top coverbase material, so that it is possible to lower cost of the top coverbase material.

BRIEF DESCRIPTION OF THE DRAWINGS

[0105]FIG. 1 is a table showing results of check test of a gasketadhesive property with respect to a separator or an MEA;

[0106]FIG. 2 is a cross sectional view of a main portion of a gasket inaccordance with a first embodiment of the present invention;

[0107]FIG. 3 is a cross sectional view of a main portion of a gasket inaccordance with a second embodiment of the present invention;

[0108]FIG. 4 is a cross sectional view of a main portion of a gasket inaccordance with a third embodiment of the present invention;

[0109]FIG. 5 is a plan view of a gasket in accordance with a fourthembodiment of the present invention;

[0110]FIG. 6 is an enlarged cross sectional view along a line A-A inFIG. 5;

[0111]FIG. 7 is a cross sectional view of a main portion showing a statein which the gasket is attached;

[0112]FIG. 8 is a plan view of a gasket in accordance with a fifthembodiment of the present invention;

[0113]FIG. 9 is an enlarged cross sectional view along a line B-B inFIG. 8;

[0114]FIG. 10 is a cross sectional view of a main portion showing astate in which the gasket is attached;

[0115]FIG. 11 is a cross sectional view of a main portion of a gasket inaccordance with a sixth embodiment of the present invention;

[0116]FIG. 12 is a cross sectional view of a main portion of a gasket inaccordance with a seventh embodiment of the present invention;

[0117]FIG. 13 is a cross sectional view of a main portion of a gasket inaccordance with an eighth embodiment of the present invention;

[0118]FIG. 14 is a cross sectional view of a main portion of a gasket inaccordance with a ninth embodiment of the present invention;

[0119]FIG. 15 is a plan view of a gasket in accordance with a tenthembodiment of the present invention;

[0120]FIG. 16 is an enlarged cross sectional view along a line D-D inFIG. 15;

[0121]FIG. 17 is an enlarged cross sectional view along a line E-E inFIG. 15;

[0122]FIG. 18 is a cross sectional view of a main portion showing astate in which the gasket is attached;

[0123]FIG. 19 is a cross sectional view of a main portion of a gasket inaccordance with an eleventh embodiment of the present invention;

[0124]FIG. 20 is a cross sectional view of a main portion of the gasket;

[0125]FIG. 21 is a cross sectional view of a main portion showing astate in which the gasket is attached;

[0126]FIG. 22 is a cross sectional view of a main portion of a gasket inaccordance with a twelfth embodiment of the present invention;

[0127]FIG. 23 is a plan view of a gasket in accordance with a thirteenthembodiment of the present invention;

[0128]FIG. 24 is an enlarged cross sectional view along a line F-F inFIG. 23;

[0129]FIG. 25 is a cross sectional view of a main portion of a gasket inaccordance with a fourteenth embodiment of the present invention;

[0130]FIG. 26 is a cross sectional view of a main portion of a gasket inaccordance with a fifteenth embodiment of the present invention;

[0131]FIG. 27 is a cross sectional view of a main portion of a gasket inaccordance with a sixteenth embodiment of the present invention;

[0132]FIG. 28 is a cross sectional view of a main portion of a gasket inaccordance with a seventeenth embodiment of the present invention;

[0133]FIG. 29 is a plan view showing a state in which a gasket inaccordance with an eighteenth embodiment of the present invention isattached;

[0134]FIG. 30 is an enlarged cross sectional view along a line G-G inFIG. 29;

[0135]FIG. 31 is a plan view showing a state before the gasket isattached (before being bent);

[0136]FIG. 32 is an enlarged cross sectional view along a line H-H inFIG. 31;

[0137]FIG. 33 is a cross sectional view of a main portion of a gasket inaccordance with a conventional embodiment;

[0138]FIG. 34 is a cross sectional view of a main portion of a gasket inaccordance with another conventional embodiment; and

[0139]FIG. 35 is a cross sectional view of a main portion of a gasket inaccordance with a comparative embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION

[0140] Next, a description will be given of embodiments in accordancewith the present invention with reference to the accompanying drawings.

First Embodiment

[0141]FIG. 2 shows a cross section (a cut end face) of a main portion ofa gasket 1 in accordance with a first embodiment of the presentinvention. This gasket 1 is used as a gasket for a fuel battery, and isstructured as follows.

[0142] That is, first, the gasket is provided with a resin film 2corresponding to a sheet-shaped gasket mounting member, and a rubber 3corresponding to a gasket main body made of a rubber elastic material isintegrally formed on one face (the upper face in the drawing) 2 a of theresin film 2 via an adhesive agent (not shown). Further, an adhesiveagent (called also as an adhesive compound) 4 is applied to another face(the lower face in the drawing) 2 b of the resin film 2, and the resinfilm 2 in which the rubber 3 is integrally formed is mounted to one faceof a separator 5 corresponding to the other end mounting member by theadhesive agent 4. The rubber 3 is formed in a triangle shape or anangular shape in a cross section with a seal lip portion 3 a, however,maybe formed in a flat seal structure (a second embodiment) as shown inFIG. 3, or a flat seal structure with a bead-like seal lip (called alsoas a bead) 3 b (a third embodiment) as shown in FIG. 4.

[0143] At a time of manufacturing the gasket 1 having the structurementioned above, an injection molding is carried out in a state in whichthe resin film 2 in which the adhesive agent is previously applied toone face 2 a is attached to a molding die for injection molding therubber 3, and the rubber 3 is bonded to one face 2 a of the resin film 2at the same time of the molding (an insert molding). Next, an integrallyformed product constituted by the resin film 2 and the rubber 3 is takenout from the molding die, the adhesive agent 4 is applied to anotherface 2 b of the resin film 2, and the integrally formed product isbonded to one face of the separator 5 by the adhesive agent 4. Theseparator 5 may be replaced by an electrolyte membrane in a reactionelectrode portion (MEA), an electrode with catalyst or the like.

[0144] In accordance with the gasket 1 having the structure mentionedabove, the following operations and effects can be achieved.

[0145] That is, first, the integrally formed product of the gasketconstituted by the resin film 2 and the rubber 3 is manufactured on thebasis of the structure mentioned above, and in this integrally formedproduct, the resin film 2 serves as a reinforcing member with respect tothe rubber 3. Accordingly, since a shape retaining property of thegasket 1 is improved in comparison with the product constituted by arubber elementary substance, and the gasket 1 is hard to be deformed asa whole, it is possible to improve a handling property or an assemblingworkability of the gasket 1.

[0146] Further, since the rubber 3 is integrally formed with the resinfilm 2 and is later bonded to the separator 5 via the resin film 2, itis not necessary to attach the separator 5 to the molding die at a timeof molding the rubber 3. Accordingly, since there is no risk that acrack or the like is generated even in the case that the separator 5 ismade of a material having a low strength or a thin plate, it is possibleto easily integrate the separator 5 with the gasket 1.

[0147] Further, since the resin film 2 attached to the molding die inplace of the separator 5 has no fear that the crack or the like isgenerated, it is possible to set a mold clamping force large at a timeof molding. Accordingly, it is possible to prevent a lot of rubber burrsfrom being generated at a time of molding.

[0148] Further, since the structure is made such that the gasket 1 ismounted to the separator 5 corresponding to the other end mountingmember in accordance with a sticking function achieved by the adhesiveagent 4 provided on another face 2 b of the resin film 2, the gasket 1can be mounted to the separator 5 in accordance with a simple work onlyof positioning and pressing the gasket 1.

[0149] In this case, in the embodiment mentioned above, in place of thestructure that the rubber 3 is integrally formed on one face 2 a of theresin film 2 via the adhesive agent, the adhesive rubber may beintegrally formed directly without applying the adhesive agent, asmentioned above. Further, the rubber which is previously formed in theproduct shape independently may be bonded to one face 2 a of the resinfilm 2 by the adhesive agent.

Fourth Embodiment

[0150]FIG. 5 shows a plan view of a gasket 21 in accordance with afourth embodiment of the present invention, and an enlarged crosssection along a line A-A (a cut end face) is shown in FIG. 6. Thisgasket 21 is used as a gasket for a fuel battery, and is structured asfollows.

[0151] That is, first, an adhesive agent 24 is attached to one face (thelower face in FIG. 6) of a resin film 23 corresponding to a sheet-shapedgasket mounting member, a mold releasing film 25 is attached to theadhesive agent 24 so as to be freely peeled, a laminated film body 22constituted by a three-layer structure as above is provided, and agasket main body 26 made of a rubber elastic material is integrated withthe film body 22 in accordance with a bonding means such as an insertmolding, a boding, a fitting or the like. The resin film 23 is formed ina predetermined plane layout in conformity with a plane shape of thefuel battery and is formed in an endless shape, and is further formed ina shape having a uniform width all around an entire periphery. Theadhesive agent 24 is attached to one face of the resin film 23 allaround an entire surface, and the mold releasing film 25 is formed inthe same plane shape as that of the resin film 23.

[0152] The gasket main body 26 made of the rubber elastic materialintegrally has a resin film side portion 27 attached to a part of aplane (the upper face in FIG. 6) 23 a of the resin film 23 in the filmbody 22, an end face side portion 28 attached to an outer end face (anouter side face, a left end face or a left side face in the drawing) 22a of the film body 22, and a mold releasing film side portion 29attached to a part of a plane (the lower face in the drawing) 25 a ofthe mold releasing film 25, and is formed in an approximately C shape ina cross section. The resin film side portion 27 forms an upper face sealportion, and a seal lip portion 30 having an approximately triangularshape in a cross section is provided in this portion 27. The moldreleasing film side portion 29 forms a lower face seal portion, and thisportion 29 is formed in a plane shape. Both the portions 27 and 29 forma pair in upper and lower sides, and form a both-face gasket.

[0153] The laminated film body 22 is not entirely covered with thegasket main body 26, an inner portion (the right portion in the drawing)thereof is exposed all around an entire periphery, and a slit portion 32is provided in the mold releasing film 25 in an exposed portion 31 allaround an entire periphery. Accordingly, the mold releasing film 25 isstructured such that an inner portion 33 than the slit portion 32 ispeeled by gripping and pulling the inner portion 33 by fingers, and theadhesive agent 24 existing in an inner face thereof is exposed in thispeeled portion. Therefore, the gasket 21 is mounted to a predeterminedportion of the other end mounting member on the basis of an adhesioneffect or a sticking function of the exposed adhesive agent 24.

[0154]FIG. 7 shows a mounting state of the gasket 21, and a groove-likegasket attaching portion 36 is previously provided on one face of theseparator 35 corresponding to the other end mounting member so as to bealigned in height. Accordingly, at a time of mounting the gasket 21 tothe separator 35, the inner portion 33 of the mold releasing film 25 ispeeled from the film body 22 as mentioned above, the mold releasing filmside portion 29 of the gasket main body 26 is fitted to the attachingportion 36 so as to be positioned, and the exposed portion 31 of thefilm body 22 is pressed to the separator 35.

[0155] In accordance with the gasket 21 having the structure mentionedabove, the same operations and effects as those of the gasket 1 inaccordance with the first embodiment can be achieved. In addition, sincethe both-face gasket is formed in the gasket main body 26 made of therubber elastic material, and in particular, the mold releasing film sideportion 29 is formed in the separator 35 corresponding to the other endmounting member as one of both the faces so as to be in direct contactwith the separator 35, it is possible to effectively seal between thefilm body 22 and the separator 35 by this mold releasing film sideportion 29. Accordingly, it is possible to obtain a high sealingperformance without depending on a material, a surface roughness or thelike of the separator 35, and a high sealing performance can be obtainedeven in the case that a sealing effect is small only by the adhesiveagent 24.

[0156] Further, since the structure is made such that the mounting tothe separator 35 is achieved not by the entire plane of the adhesiveagent 24 applied to the entire face of the lower face of the resin film23 but by the partial plane, the sticking area is comparatively small,so that it is possible to make a positioning work at a time of stickingthe gasket 21 to the separator 35 easy.

[0157] Further, since the structure is made such that the gasket 21 canbe mounted to the separator 35 corresponding to the other end mountingmember on the basis of the sticking function obtained by the adhesiveagent 24 applied to the lower face of the resin film 23, it is possibleto mount the gasket 21 to the separator 35 on the basis of a simple workonly of positioning the gasket 21 and pressing the exposed portion 31 ofthe film body 22.

[0158] In this case, in this fourth embodiment, as shown in the planview in FIG. 5, the exposed portion 31 in the laminated film body 22 isprovided in the entire periphery of the gasket 21, and the portion (theinner portion 33) on the plane of the mold releasing film 25, to whichthe mold releasing film side portion 29 is not applied and which ispeeled at a time of the mounting work is provided all around the entireperiphery of the gasket 21. However, in the case that the sticking areamay be reduced, the structure can be made, as shown in FIGS. 8 to 10,such that the exposed portion 31 and the inner portion 33 are providedin a plurality positions on the periphery of the gasket 21 (a fifthembodiment). In accordance with this structure, since the sticking areacan be further reduced, it is possible to make the positioning work andthe sticking work including the positioning work easier. In a plan viewin FIG. 8, the exposed portion 31 and the inner portion 33 are providedat six positions on the periphery of the gasket 21, and each of theexposed portion 31 is provided in an inward projection shape inwarddirected with respect to the main body portion of the film body 22covered with the gasket main body 26. FIG. 9 is an enlarged crosssectional view along a line B-B in FIG. 8, and FIG. 10 is a crosssectional view showing an attaching state thereof. An enlarged crosssection along a line C-C in FIG. 8 is the same shape as that in FIG. 6.

Sixth Embodiment

[0159]FIG. 11 shows a cross section of a main portion (a cut end face)of a gasket 11 in accordance with a sixth embodiment of the presentinvention. This gasket 11 is used as a gasket for a fuel battery, and isstructured as follows.

[0160] That is, first, one sheet of resin film 13 corresponding to thesheet-shaped gasket mounting member is provided in the upper side in thedrawing of an electrolyte membrane (an ion exchange membrane) 12 in areaction electrode portion (MEA) corresponding to the other end mountingmember, and a gasket main body 14 made of a rubber elastic material isintegrally formed on one face (the upper face in the drawing) 13 a ofthe resin film 13 via an adhesive agent (not shown). Further, anadhesive agent (not shown) is applied to another face (the lower face inthe drawing) 13 b of the resin film 13, and the resin film 13 in whichthe gasket main body 14 is integrally formed is mounted to one face 12 aof the electrolyte membrane 12 by this adhesive agent.

[0161] In a vertically symmetrical manner, one sheet of resin film 13corresponding to the sheet-shaped gasket mounting member is provided inthe lower side in the drawing of the electrolyte membrane 12 in thereaction electrode portion corresponding to the other end mountingmember, and the gasket main body 14 made of the rubber elastic materialis integrally formed on one face (the lower face in the drawing) 13 a ofthe resin film 13 via an adhesive agent (not shown). Further, anadhesive agent (not shown) is applied to another face (the upper face inthe drawing) 13 b of the resin film 13, and the resin film 13 in whichthe gasket main body 14 is integrally formed is mounted to another face12 b of the electrolyte membrane 12 by this adhesive agent.

[0162] The gasket main body 14 arranged in the upper side of the drawingbasically has a flat seal structure, and two bead-like seal lip portions14 a are integrally formed in parallel to each other on the upper faceof the gasket main body 14 in the drawing. Further, the gasket main body14 arranged in the lower side of the drawing basically has a flat sealstructure, and two bead-like seal lip portions 14 a are integrallyformed in parallel to each other on the lower face of the gasket mainbody 14 in the drawing. The upper and lower gasket main bodies 14 areformed in mutually symmetrical shapes.

[0163] In accordance with the gasket 11 having the structure mentionedabove, the same operations and effects as those of the gasket 1 inaccordance with the first embodiment mentioned above can be achieved.Further, since two bead-like seal lip portions 14 a are provided in eachof the gasket main bodies 14 on both the faces of the electrolytemembrane 12, it is possible to prevent a surface pressure peak value ofthe gasket main body 14 from being lowered, even when positions at whichthe resin films 13 are stuck on both the faces are slightly displaced tothe right or left side in the drawing.

[0164] In this case, in this embodiment, in place of the structure thatthe gasket main body 14 is integrally formed on one face 13 a of theresin film 13 via the adhesive agent, the adhesive rubber may beintegrally formed directly without applying the adhesive agent, asmentioned above. Further, the structure may be made such that the gasketmain body 14 which is previously formed in the product shapeindependently is bonded to one face 13 a of the resin film 13 by theadhesive agent.

Seventh Embodiment

[0165]FIG. 12 shows a cross section of a main portion (a cut end face)of a gasket 11 in accordance with a seventh embodiment of the presentinvention. This gasket 11 is used as a gasket for a fuel battery, and isstructured as follows.

[0166] That is, first, one sheet of resin film 13 corresponding to thesheet-shaped gasket mounting member is provided in the upper side in thedrawing of an electrolyte membrane (an ion exchange membrane) 12 in areaction electrode portion (MEA) corresponding to the other end mountingmember, and a gasket main body 14 made of a rubber elastic material isintegrally formed on one face (the upper face in the drawing) 13 a ofthe resin film 13 via an adhesive agent (not shown). Further, anadhesive agent (not shown) is applied to another face (the lower face inthe drawing) 13 b of the resin film 13, and the resin film 13 in whichthe gasket main body 14 is integrally formed is mounted to one face 12 aof the electrolyte membrane 12 by this adhesive agent.

[0167] In a vertically symmetrical manner, one sheet of resin film 13corresponding to the sheet-shaped gasket mounting member is provided inthe lower side in the drawing of the electrolyte membrane 12 in thereaction electrode portion corresponding to the other end mountingmember, and the gasket main body 14 made of the rubber elastic materialis integrally formed on one face (the lower face in the drawing) 13 a ofthe resin film 13 via an adhesive agent (not shown). Further, anadhesive agent (not shown) is applied to another face (the upper face inthe drawing) 13 b of the resin film 13, and the resin film 13 in whichthe gasket main body 14 is integrally formed is mounted to another face12 b of the electrolyte membrane 12 by this adhesive agent.

[0168] The gasket main body 14 arranged in the upper side of the drawingbasically has a flat seal structure, and any bead-like seal lip is notformed on the upper face of the gasket main body 14 in the drawing, butthe upper face is formed in a gentle angular shape so as to make thesurface pressure peak large. Further, the gasket main body 14 arrangedin the lower side of the drawing basically has a flat seal structure,and any bead-like seal lip is not formed on the lower face of the gasketmain body 14 in the drawing, but the lower face is formed in a gentleangular shape so as to make the surface pressure peak large. The upperand lower gasket main bodies 14 are formed in mutually symmetricalshapes.

[0169] In accordance with the gasket 11 having the structure mentionedabove, the same operations and effects as those of the gasket 1 inaccordance with the first embodiment mentioned above can be achieved.Further, since each of the gasket main bodies 14 is formed in the gentleangular shape without arranging the bead-like seal lip in each of thegasket main bodies 14 on both the faces of the electrolyte membrane 12,it is possible to prevent a surface pressure peak value of the gasketmain body 14 from being lowered, even when positions at which the resinfilms 13 are stuck on both the faces are slightly displaced to the rightor left side in the drawing.

[0170] In this case, in this embodiment, in place of the structure thatthe gasket main body 14 is integrally formed on one face 13 a of theresin film 13 via the adhesive agent, the adhesive rubber may beintegrally formed directly without applying the adhesive agent, asmentioned above. Further, the structure may be made such that the gasketmain body 14 which is previously formed in the product shapeindependently is bonded to one face 13 a of the resin film 13 by theadhesive agent.

Eighth Embodiment

[0171]FIG. 13 shows a cross section of a main portion (a cut end face)of a gasket 11 in accordance with an eighth embodiment of the presentinvention. This gasket 11 is used as a gasket for a fuel battery, and isstructured as follows.

[0172] That is, first, one sheet of resin film 13 corresponding to thesheet-shaped gasket mounting member is provided in the upper side in thedrawing of an electrolyte membrane (an ion exchange membrane) 12 in areaction electrode portion (MEA) corresponding to the other end mountingmember, and a gasket main body 14 made of a rubber elastic material isintegrally formed on one face (the upper face in the drawing) 13 a ofthe resin film 13 via an adhesive agent (not shown). Further, anadhesive agent (not shown) is applied to another face (the lower face inthe drawing) 13 b of the resin film 13, and the resin film 13 in whichthe gasket main body 14 is integrally formed is mounted to one face 12 aof the electrolyte membrane 12 by this adhesive agent.

[0173] In a vertically symmetrical manner, one sheet of resin film 13corresponding to the sheet-shaped gasket mounting member is provided inthe lower side in the drawing of the electrolyte membrane 12 in thereaction electrode portion corresponding to the other end mountingmember, and the gasket main body 14 made of the rubber elastic materialis integrally formed on one face (the lower face in the drawing) 13 a ofthe resin film 13 via an adhesive agent (not shown). Further, anadhesive agent (not shown) is applied to another face (the upper face inthe drawing) 13 b of the resin film 13, and the resin film 13 in whichthe gasket main body 14 is integrally formed is mounted to another face12 b of the electrolyte membrane 12 by this adhesive agent.

[0174] The gasket main body 14 arranged in the upper side of the drawingbasically has a flat seal structure, and one bead-like seal lip portion14 a is integrally formed on the upper face of the gasket main body 14in the drawing. Further, the gasket main body 14 arranged in the lowerside of the drawing basically has a flat seal structure, and anybead-like seal lip is not provided on the lower face of the gasket mainbody 14 in the drawing, but the lower face is formed in a gentle angularshape so as to make a surface pressure peak large. The upper and lowergasket main bodies 14 are formed in mutually asymmetrical shapes.

[0175] In accordance with the gasket 11 having the structure mentionedabove, the same operations and effects as those of the gasket 1 for thefuel battery in accordance with the first embodiment mentioned above canbe achieved. Further, since one bead-like seal lip portion 14 a isprovided in the gasket main body 14 in the side of one face 12 a of theelectrolyte membrane 12, and in the gasket main body 14 in the side ofanother face 12 b, no bead-like seal lip is provided and the gasket mainbody 14 is formed in the gentle angular shape, it is possible to preventa surface pressure peak value of the gasket main body 14 from beinglowered, even when positions at which the resin films 13 are stuck onboth the faces are slightly displaced to the right or left side in thedrawing.

[0176] In this case, in this embodiment, in place of the structure thatthe gasket main body 14 is integrally formed on one face 13 a of theresin film 13 via the adhesive agent, the adhesive rubber may beintegrally formed directly without applying the adhesive agent, asmentioned above. Further, the structure may be made such that the gasketmain body 14 which is previously formed in the product shapeindependently is bonded to one face 13 a of the resin film 13 by theadhesive agent.

Ninth Embodiment

[0177]FIG. 14 shows a cross section of a main portion (a cut end face)of a gasket 11 in accordance with a ninth embodiment of the presentinvention. This gasket 11 is used as a gasket for a fuel battery, and isstructured as follows.

[0178] That is, first, one sheet of resin film 13 corresponding to thesheet-shaped gasket mounting member is provided in the upper side in thedrawing of an electrolyte membrane (an ion exchange membrane) 12 in areaction electrode portion (MEA) corresponding to the other end mountingmember, and a gasket main body 14 made of a rubber elastic material isintegrally formed on one face (an upper face in the drawing) 13 a of theresin film 13 via an adhesive agent (not shown). Further, an adhesiveagent (not shown) is applied to another face (a lower face in thedrawing) 13 b of the resin film 13, and the resin film 13 in which thegasket main body 14 is integrally formed is mounted to one face 12 a ofthe electrolyte membrane 12 by this adhesive agent.

[0179] In a vertically symmetrical manner, one sheet of resin film 13corresponding to the sheet-shaped gasket mounting member is provided ina lower side in the drawing of the electrolyte membrane 12 in thereaction electrode portion corresponding to the other end mountingmember, and the gasket main body 14 made of the rubber elastic materialis integrally formed on one face (the lower face in the drawing) 13 a ofthe resin film 13 via an adhesive agent (not shown). Further, anadhesive agent (not shown) is applied to another face (the upper face inthe drawing) 13 b of the resin film 13, and the resin film 13 in whichthe gasket main body 14 is integrally formed is mounted to another face12 b of the electrolyte membrane 12 by this adhesive agent.

[0180] The gasket main body 14 arranged in the upper side of the drawingbasically has a flat seal structure, and one bead-like seal lip portion14 a is integrally formed on an upper face of the gasket main body 14 inthe drawing. Further, the gasket main body 14 arranged in the lower sideof the drawing basically has a flat seal structure, and two bead-likeseal lip portions 14 a are integrally formed in parallel to each otheron the lower face of the gasket main body 14 in the drawing. The upperand lower gasket main bodies 14 are formed in mutually asymmetricalshapes.

[0181] In accordance with the gasket 11 having the structure mentionedabove, the same operations and effects as those of the gasket 1 inaccordance with the first embodiment mentioned above can be achieved.Further, since one bead-like seal lip portion 14 a is provided in thegasket main body 14 in the side of one face 12 a of the electrolytemembrane 12 and two bead-like seal lip portions 14 a are provided in thegasket main body 14 in the side of another face 12 b, it is possible toprevent a surface pressure peak value of the gasket main body 14 frombeing lowered, even when positions at which the resin films 13 are stuckon both the faces are slightly displaced to the right or left side inthe drawing.

[0182] In this case, in this embodiment, in place of the structure thatthe gasket main body 14 is integrally formed on one face 13 a of theresin film 13 via the adhesive agent, the adhesive rubber may beintegrally formed directly without applying the adhesive agent, asmentioned above. Further, the structure may be made such that the gasketmain body 14 which is previously formed in the product shapeindependently is bonded to one face 13 a of the resin film 13 by theadhesive agent.

Tenth Embodiment

[0183]FIG. 15 shows a plan view of a gasket 41 in accordance with atenth embodiment of the present invention, an enlarged cross sectionalong a line D-D (a cut end face) of the gasket is shown in FIG. 16, andan enlarged cross section along a line E-E (a cut end face) of thegasket is shown in FIG. 17. The gasket 41 is used as a gasket for a fuelbattery, and is structured as follows.

[0184] That is, first, the gasket is provided with a gasket main body 42constituted in a rubber-only type and made of a rubber elastic material,and resin films 44 corresponding to the sheet-shaped gasket mountingmember are mounted to a plurality of positions on a periphery of thegasket main body 42. An adhesive agent 45 is applied to one face (thelower face in FIG. 17) of each of the resin films 44, a mold releasingfilm 46 is attached to the adhesive agent 45 so as to be freely peeled,a laminated film body 43 constituted by a three-layer structure as aboveis provided, and the film body 43 is integrated with the gasket mainbody 42 mentioned above in accordance with a bonding means such as aninsert molding, a boding, a fitting or the like. A plurality of resinfilms 44 or the film bodies 43 are arranged on the same plane with eachother.

[0185] The gasket main body 42 made of the rubber elastic material isformed in a predetermined plane layout in correspondence to a planeshape of the fuel battery and is formed in an endless shape. Further,the gasket main body 42 is formed in an O-ring shape having a circularcross section, and each of the film bodies 43 is arranged in anapproximately center position in the height direction in an outerperipheral portion of the gasket main body 42. As mentioned above, sinceeach of the film bodies 43 is arranged in the approximately center inthe height direction of the gasket main body 42, the gasket 41structures a both-face gasket.

[0186] The laminated film body 43 is not covered with the gasket mainbody 42 in all areas, but an outer portion (a right portion in FIG. 17)thereof is exposed from the gasket main body 42, and a slit portion 48is provided in the mold releasing film 46 in this exposed portion 47.Accordingly, the mold releasing film 46 is structured such that an outerportion 49 than the slit portion 48 is peeled by gripping and pullingthe outer portion 49 by fingers, and the adhesive agent 45 existing inthe inner face thereof is exposed in this peeled portion. Therefore, thegasket 41 can be mounted to a predetermined portion of the other endmounting member on the basis of an adhesion effect or a stickingfunction of the exposed adhesive agent 45.

[0187]FIG. 18 shows a mounting state of the gasket, and a step-likegasket attaching portion 51 is previously provided on one face of theseparator 50 corresponding to the other end mounting member so as to bealigned in height. Accordingly, at a time of mounting the gasket 41 tothe separator 50, the outer portion 49 of the mold releasing film 46 ispeeled from the film body 43 as mentioned above, the gasket main body 42is positioned with respect to the gasket attaching portion 51, and theexposed portion 47 of the film body 43 is pressed to the separator 50.

[0188] In accordance with the gasket 41 having the structure mentionedabove, the same operations and effects as those of the gasket 1 inaccordance with the first embodiment can be achieved. In addition, sincethe structure is made such that the gasket 41 is mounted to theseparator 50 on the basis of the sticking function of the adhesive agent45 applied to the lower face of the resin film 44, it is possible tomount the gasket 41 to the separator 50 by a simple work only ofpositioning the gasket 41 and pressing the exposed portion 47 of each ofthe film bodies 43.

[0189] Further, since the both-face gasket is structured by the gasketmain body 41 formed in the O-ring shape having the circular crosssection, the gasket main body 42 is in direct contact with the separator50, so that it is possible to effectively seal between the film body 43and the separator 50. Accordingly, it is possible to obtain a highsealing performance without depending on a material, a surface roughnessor the like of the separator 50, and a high sealing performance can beobtained even in the case that a sealing effect is small only by theadhesive agent 45.

[0190] In this case, in this tenth embodiment, the cross sectional shapeof the gasket main body 42 is formed in the O-ring shape having thecircular cross section, however, this cross sectional shape may be a lipshape as shown in FIGS. 19 to 21, and in the illustrated embodiment, aseal lip portion 52 is integrally formed in each of upper and lowerfaces of the gasket main body 42 (an eleventh embodiment).

[0191] Further, the other end mounting member may be an electrolytemembrane (an ion exchange membrane) 53 in a reaction electrode portionas shown in FIG. 22, and in this case, the gasket 41 is mounted to eachof both upper and lower faces of the electrolyte membrane (a twelfthembodiment).

Thirteenth Embodiment

[0192]FIG. 23 shows a plan view of a gasket 61 in accordance with athirteenth embodiment of the present invention, and an enlarged crosssection (a cut end face) along a line F-F of the gasket is shown in FIG.24. The gasket 61 is used as a gasket for a top cover in the HDD, and isstructured as follows.

[0193] That is, first, the gasket is provided with a resin film 62corresponding to a sheet-shaped gasket mounting member, and a gasketmain body 64 made of a rubber elastic material is integrally formed onone face (the upper face in FIG. 24) of the resin film 62 via anadhesive agent 63. Further, an adhesive agent (called also as anadhesive compound) 65 is applied to another face (a lower face in FIG.24) of the resin film 64, and the resin film 62 in which the gasket mainbody 64 is integrally formed is mounted to one face of a top cover 66 asthe other end mounting member by the adhesive agent 65. The gasket mainbody 64 is formed in an approximately triangular shape in a crosssection, and a top portion of the gasket main body is formed as a seallip portion 67.

[0194] At a time of manufacturing the gasket 61 having the structurementioned above, an injection molding is carried out in a state in whichthe resin film 62 in which the adhesive agent 63 is previously appliedto one face is attached to a molding die for injection molding thegasket main body 64, and the gasket main body 64 is bonded to one faceof the resin film 62 at the same time of the molding (an insertmolding). Next, an integrally formed product constituted by the resinfilm 62 and the gasket main body 64 is taken out from the molding die,the adhesive agent 65 is applied to another face of the resin film 62,and the integrally formed product is bonded to one face of the top cover66 by the adhesive agent 65.

[0195] In accordance with the gasket 61 having the structure mentionedabove, the following operations and effects can be achieved.

[0196] That is, first, the integrally formed product of the gasket 61constituted by the resin film 62 and the gasket main body 64 ismanufactured on the basis of the structure mentioned above, and in thisintegrally formed product, the resin film 62 serves as a reinforcingmember with respect to the gasket main body 64. Accordingly, since ashape retaining property of the gasket 61 is improved in comparison withthe product constituted by a rubber elementary substance, and the gasket61 is hard to be deformed as a whole, it is possible to improve ahandling property of the gasket 61.

[0197] Further, since the gasket main body 64 is integrally formed withthe resin film 62 and is later bonded to the top cover 66 via the resinfilm 62, it is not necessary to attach the top cover 66 to the moldingdie at a time of molding the gasket main body 64. Accordingly, sincethere is no risk that a crack or the like is generated even in the casethat the top cover 66 is made of a material having a low strength or athin plate, it is possible to easily integrate the top cover 66 with thegasket 61.

[0198] Further, since the resin film 62 attached to the molding die inplace of the top cover 66 has no fear that the crack or the like isgenerated, it is possible to largely set a mold clamping force at a timeof molding. Accordingly, it is possible to prevent a lot of rubber burrsfrom being generated at a time of molding.

[0199] Further, since the structure is made such that the gasket 61 ismounted to the top cover 66 corresponding to the other end mountingmember in accordance with a sticking function achieved by the adhesiveagent 65 provided on another face of the resin film 62, the gasket 61can be mounted to the top cover 66 in accordance with a simple workobtained only by positioning and pressing the gasket 61.

[0200] In this case, in the embodiment mentioned above, in place of thestructure that the gasket main body 64 is integrally formed on one faceof the resin film 62 via the adhesive agent 63, the adhesive rubber maybe integrally formed directly without applying the adhesive agent 63, asmentioned above. FIG. 25 shows one embodiment of the structure (afourteenth embodiment) Further, the gasket main body 64 which ispreviously formed in the product shape independently may be bonded toone face of the resin film 62 by the adhesive agent 65.

Fifteenth Embodiment

[0201]FIG. 26 shows a cross section (a cut end face) of a main portionof a gasket 71 in accordance with a fifteenth embodiment of the presentinvention. The gasket 71 is used as a gasket for a top cover in the HDD,and is structured as follows.

[0202] That is, first, an adhesive agent (called also as an adhesivecompound) 74 is attached to one face (the lower face in the drawing) ofa resin film 73 corresponding to a sheet-shaped gasket mounting member,a mold releasing film 75 is attached to the adhesive agent 74 so as tobe freely peeled, a laminated film body 72 constituted by a three-layerstructure as above is provided, and a gasket main body 76 made of arubber elastic material is integrated with the film body 72 inaccordance with a bonding means such as an insert molding, a boding, afitting or the like. The resin film 73 is formed in a predeterminedplane layout in conformity with a plane shape of the top cover and isformed in an endless shape, and is further formed in a shape having auniform width all around an entire periphery. The adhesive agent 74 isattached to one face of the resin film 73 all around an entire surface,and the mold releasing film 75 is formed in the same plane shape as thatof the resin film 73.

[0203] The gasket main body 76 made of the rubber elastic materialintegrally has a resin film side portion 77 attached to a part of aplane (the upper face in the drawing) 73 a of the resin film 73 in thefilm body 72 mentioned above, an end face side portion 78 attached to anouter end face (an outer side face, the left end face or the left sideface in the drawing) 72 a of the film body 72, and a mold releasing filmside portion 79 attached to a part of a plane (the lower face in thedrawing) 75 a of the mold releasing film 75, and is formed in anapproximately C shape in a cross section. The resin film side portion 77forms an upper face seal portion, and a seal lip portion 80 having anapproximately triangular shape in a cross section is provided in thisportion 77. The mold releasing film side portion 79 forms a lower faceseal portion, and this portion 79 is also provided with a seal lipportion 81 having an approximately triangular shape in a cross section.Both the portions 77 and 79 form a pair of the upper and lower sides,and form a both-face gasket.

[0204] The laminated film body 72 is not entirely covered with thegasket main body 76, an inner portion (a right portion in the drawing)thereof is exposed all around an entire periphery, and a slit portion 83is provided in the mold releasing film 75 in an exposed portion 82 allaround an entire periphery. Accordingly, the mold releasing film 75 isstructured such that an inner portion (which is not shown, and isalready peeled in the drawing showing an attached state) than the slitportion 83 is peeled by gripping and pulling the inner portion byfingers, and the adhesive agent 74 existing in an inner face thereof isexposed in this peeled portion. Therefore, the gasket 71 can be to apredetermined portion of the other end mounting member on the basis ofan adhesion effect or a sticking function of the exposed adhesive agent74.

[0205]FIG. 26 shows a mounting state of the gasket 71, and a groove-likegasket attaching portion 85 is previously provided on one face of thetop cover 84 corresponding to the other end mounting member so as to bealigned in height. Accordingly, at a time of mounting the gasket 71 tothe top cover 84, the inner portion of the mold releasing film 75 ispeeled from the film body 72 as mentioned above, the mold releasing filmside portion 79 of the gasket main body 76 is fitted to the attachingportion 85 so as to be positioned, and the exposed portion 82 of thefilm body 72 is pressed to the top cover 84.

[0206] In accordance with the gasket 71 having the structure mentionedabove, the same operations and effects as those of the gasket 1 inaccordance with the first embodiment can be achieved. In addition, sincethe both-face gasket is formed in the gasket main body 76 made of therubber elastic material, and in particular, the mold releasing film sideportion 79 is formed in the top cover 66 corresponding to the other endmounting member as one of both the faces so as to be in direct contactwith the top cover 66, it is possible to effectively seal between thefilm body 72 and the top cover 84 by this mold releasing film sideportion 79. Accordingly, it is possible to obtain a high sealingperformance without depending on a material, a surface roughness or thelike of the top cover 84, and a high sealing performance can be obtainedeven in the case that a sealing effect is small only by the adhesiveagent 74.

[0207] Further, since the structure is made such that the mounting tothe top cover 84 is achieved not by the entire plane of the adhesiveagent 74 applied to the entire face of the lower face of the resin film73 but by the partial plane, the sticking area is comparatively small,so that it is possible to make a positioning work at a time of stickingthe gasket 71 to the top cover 84 easy.

[0208] Further, since the structure is made such that the gasket 71 ismounted to the top cover 84 corresponding to the other end mountingmember on the basis of the sticking function obtained by the adhesiveagent 74 applied to the lower face of the resin film 73, it is possibleto mount the gasket 71 to the top cover 84 on the basis of a simple workonly of positioning the gasket 71 and pressing the exposed portion 82 ofthe film body 72.

[0209] In this case, the cross sectional shape of the gasket main body76 may be an O-ring shape (a sixteenth embodiment) as shown in FIG. 27,or a lip shape (a seventeenth embodiment) as shown in FIG. 28.

Eighteenth Embodiment

[0210]FIG. 29 shows a plan view of a state that a gasket 91 inaccordance with an eighteenth embodiment of the present invention ismounted to an electrolyte membrane 92 corresponding to the other endmounting member, and an enlarged cross section (a cut end face) along aline G-G of the gasket is shown in FIG. 30. This gasket 91 is used as agasket for a fuel battery, and is structured as follows.

[0211] That is, first, the gasket is provided with a resin film 93corresponding to the sheet-shaped gasket mounting member, the resin film93 is integrally provided with a portion (called also as one face sideportion) 94 arranged in the side of one face 92 a of the electrolytemembrane 92, a portion (called also as another face side portion) 95arranged in the side of another face 92 b, and a connection portion 96connecting both the portions 94 and 95 and having a comparatively narrowwidth, and gasket main bodies 96 and 97 made of a rubber elasticmaterial are integrally formed on an upper face 94 a in the drawing ofthe one face side portion 94 and a lower face 95 a in the drawing of theanother face side portion 95 via an adhesive agent (not shown),respectively.

[0212] The gasket 91 integrally provided with the resin film 93 and thegasket main bodies 96 and 97 is structured such that the one face sideportion 94, the another face side portion 95 and the connection portion96 of the resin film 93 are formed as one sheet in plane shape, and thegasket main bodies 96 and 97 are integrally formed by injection moldingon one face 94 a and one face 95 a in the same side of the one face sideportion 94 and the another face side portion 95, respectively. Thegasket is bent in two in the connection portion 96 at a time of beingmounted, and is bonded to both the faces 92 a and 92 b of theelectrolyte membrane 92 via an adhesive agent (an adhesive compound) 99applied to another face 93 a of the resin film 93.

[0213] A bending position specifying portion 100 constituted by a slitis provided in the connection portion 96 of the resin film 93 all aroundan entire width in the side of one face 96 a so as to make theconnection portion 96 easy to be bent.

[0214] At a time of manufacturing the gasket 91 having the structurementioned above, an injection molding is carried out in a state in whichthe resin film 93 in which the adhesive agent is previously applied toone face 94 a and one face 95 a is attached to a molding die forinjection molding the gasket main bodies 97 and 98 in a state of beingattached in a plane shape, and the gasket main bodies 97 and 98 arebonded to one face 94 a and one face 95 a of the resin film 93 at thesame time of the molding (an insert molding). Next, an integrally formedproduct constituted by the resin film 93 and the gasket main bodies 97and 98 is taken out from the molding die, the adhesive agent 99 isapplied to another face 93 a of the resin film 93, and the integrallyformed product is bonded to both the faces 92 a and 92 b of theelectrolyte membrane 92 by the adhesive agent 99. The electrolytemembrane 92 may be replaced by the separator or the like.

[0215] In accordance with the gasket 91 having the structure mentionedabove, the following operations and effects can be achieved.

[0216] That is, first, the integrally formed product of the gasketconstituted by the resin film 93 and the gasket main bodies 97 and 98 ismanufactured on the basis of the structure mentioned above, and in thisintegrally formed product, the resin film 93 serves as a reinforcingmember with respect to the gasket main bodies 97 and 98. Accordingly,since a shape retaining property of the gasket 91 is improved incomparison with the product constituted by a rubber elementarysubstance, and the gasket 91 is hard to be deformed as a whole, it ispossible to improve a handling property or assembling workability of thegasket 61.

[0217] Further, since the gasket main bodies 97 and 98 are integrallyformed with the resin film 93 and are later bonded to the electrolytemembrane 92 via the resin film 93, it is not necessary to attach theelectrolyte membrane 92 to the molding die at a time of molding thegasket main bodies 97 and 98. Accordingly, since there is no risk that acrack or the like is generated even in the case that the electrolytemembrane 92 is made of a material having low strength or a thin plate,it is possible to easily integrate the electrolyte membrane 92 with thegasket 91.

[0218] Further, since the resin film 93 attached to the molding die inplace of the electrolyte membrane 92 has no fear that the crack or thelike is generated, it is possible to set a mold clamping force large ata time of molding. Accordingly, it is possible to prevent a lot ofrubber burrs from being generated at a time of molding.

[0219] Further, since the structure is made such that the gasket 91 ismounted to the electrolyte membrane 92 corresponding to the other endmounting member in accordance with a sticking function achieved by theadhesive agent 99 provided on another face 93 a of the resin film 93,the gasket 91 can be mounted to the electrolyte membrane 92 inaccordance with a simple work only of bending, positioning and pressingthe gasket 91.

[0220] Still further, since the gasket is provided with the gasket mainbodies 97 and 98 for both faces arranged on both the faces 92 a and 92 bof the electrolyte membrane 92 corresponding to the other end mountingmember, and the resin film 93 integrated with the gasket main bodies 97and 98 for both faces, and the gasket 91 is structured such as to bebent in two at a time of being mounted to the electrolyte membrane 92 soas to be bonded to both the faces 92 a and 92 b of the electrolytemembrane 92, it is possible to manufacture and handle originally twogaskets required on both the faces 92 a and 92 b of the electrolytemembrane 92 in a state of combining into one piece. Accordingly, it ispossible to widely reduce a number of man-hour and a cost formanufacturing.

[0221] In this case, in the embodiment mentioned above, the gasket mainbodies 97 and 98 may be formed in accordance with a dispenser method, aprinting method or the like in place of the injection molding method,and the adhesive rubber may be integrally formed directly withoutapplying the adhesive agent in place of integrally forming the gasketmain bodies 97 and 98 on one face 94 a and one face 95 a of the resinfilm 93 via the adhesive agent, as mentioned above. Further, the gasketmain bodies 97 and 98 which are previously formed in the product shapeindependently may be bonded to one face 94 a and one face 95 a of theresin film 93 by the adhesive agent.

EFFECT OF THE INVENTION AND INDUSTRIAL APPLICABILITY

[0222] The present invention achieves the following effects.

[0223] That is, first, in the gasket in accordance with the first aspectof the present invention provided with the structure mentioned above,since the integrated product constituted by the sheet-shaped gasketmounting member provided with the sticking function on one face and thegasket main body made of the rubber-type elastic material is formed, thesheet-shaped gasket mounting member serves as an effect of reinforcingthe gasket main body, so that it is possible to restrict the deformationof the whole of the gasket comparatively small at a time of handling.Accordingly, it is possible to improve a handling property or assemblingworkability of the gasket. Further, since the gasket main body isintegrated with the sheet-shaped gasket mounting member and is bonded tothe other end mounting member via the sheet-shaped gasket mountingmember, it is not necessary to attach the other end mounting member tothe molding die at a time of molding the gasket main body. Accordingly,since there is no risk that any crack or the like is generated even inthe case that the other end mounting member is a material having lowstrength or a thin plate, it is possible to easily integrate the otherend mounting member with the gasket. Further, in the case that thesheet-shaped gasket mounting member attached to the molding die in placeof the other end mounting member is, for example, a resin film, sincethere is no risk that the crack or the like is generated in thissheet-shaped gasket mounting member, it is possible to set the moldclamping force large, so that it is possible to inhibit a lot of moldingburrs from being generated. Further, since the structure is made suchthat the gasket is mounted to the other end mounting member on the basisof the sticking function provided on one face of the sheet-shaped gasketmounting member, it is possible to mount the gasket to the other endmounting member in accordance with a simple work of only positioning andpressing the gasket. The other end mounting member is, for example, theseparator for the fuel battery (the fourteenth aspect), and the reactionelectrode portion for the fuel battery or the electrolyte membrane asthe component part thereof (the fifteenth aspect) or the top cover foran HDD (the sixteenth aspect) the operations and effects mentioned abovecan be obtained with respect to an exclusive gasket used for each ofthem.

[0224] Further, in the gasket in accordance with the second aspect ofthe present invention provided with the structure mentioned above, sincethe gasket main body is integrally formed on another face (the oppositeface to one face provided with the sticking function) of thesheet-shaped gasket mounting member by using the adhesive agent, thesheet-shaped gasket mounting member also serves as the effect ofreinforcing the gasket main body, so that it is possible to restrict thedeformation of the whole of the gasket comparatively small at a time ofhandling. Accordingly, it is possible to improve a handling property orassembling workability of the gasket. Further, since the gasket mainbody is integrated with the sheet-shaped gasket mounting member and isbonded to the other end mounting member via the sheet-shaped gasketmounting member, it is not necessary to attach the other end mountingmember to the molding die at a time of molding the gasket main body.Accordingly, since there is no risk that any crack or the like isgenerated even in the case that the other end mounting member is thematerial having low strength or a thin plate, it is possible to easilyintegrate the other end mounting member with the gasket. Further, in thecase that the sheet-shaped gasket mounting member attached to themolding die in place of the other end mounting member is, for example, aresin film, since there is no risk that the crack or the like isgenerated in this sheet-shaped gasket mounting member, it is possible toset the mold clamping force large, so that it is possible to inhibit alot of molding burrs from being generated.

[0225] Further, in the gasket in accordance with the third aspect of thepresent invention provided with the structure mentioned above, since themain body is made of the adhesive rubber and is integrally formed onanother face of the sheet-shaped gasket mounting member by using theadhesive property of the adhesive rubber, the sheet-shaped gasketmounting member also serves as the effect of reinforcing the gasket mainbody, so that it is possible to restrict the deformation of the whole ofthe gasket comparatively small at a time of handling. Accordingly, it ispossible to improve a handling property or assembling workability of thegasket. Further, since the gasket main body is integrated with thesheet-shaped gasket mounting member and is bonded to the other endmounting member via the sheet-shaped gasket mounting member, it is notnecessary to attach the other end mounting member to the molding die ata time of molding the gasket main body. Accordingly, since there is norisk that any crack or the like is generated even in the case that theother end mounting member is a material having low strength or a thinplate, it is possible to easily integrate the other end mounting memberwith the gasket. Further, in the case that the sheet-shaped gasketmounting member attached to the molding die in place of the other endmounting member is, for example, a resin film, since there is no riskthat the crack or the like is generated in this sheet-shaped gasketmounting member, it is possible to set the mold clamping force large, sothat it is possible to inhibit a lot of molding burrs from beinggenerated.

[0226] Further, in the gasket in accordance with the fourth aspect ofthe present invention provided with the structure mentioned above, sincethe gasket main body is integrally formed on both faces of the endportion of the sheet-shaped gasket mounting member by using the adhesiveagent, the sheet-shaped gasket mounting member also serves as the effectof reinforcing the gasket main body, so that it is possible to restrictthe deformation of the whole of the gasket comparatively small at a timeof handling. Accordingly, it is possible to improve a handling propertyand assembling workability of the gasket. Further, since the gasket mainbody is integrated with the sheet-shaped gasket mounting member and isbonded to the other end mounting member via the sheet-shaped gasketmounting member, it is not necessary to attach the other end mountingmember to the molding die at a time of molding the gasket main body.Accordingly, since there is no risk that any crack or the like isgenerated even in the case that the other end mounting member is amaterial having low strength or a thin plate, it is possible to easilyintegrate the other end mounting member with the gasket. Further, in thecase that the sheet-shaped gasket mounting member attached to themolding die in place of the other end mounting member is, for example, aresin film, since there is no risk that the crack or the like isgenerated in this sheet-shaped gasket mounting member, it is possible toset the mold clamping force large, so that it is possible to inhibit alot of molding burrs from being generated. Further, since the gasketmain body is integrally formed on both faces of the end portion of thesheet-shaped gasket mounting member, the both-face gasket is formed, andthe gasket main body is in direct contact with the other end mountingmember, so that it is possible to securely seal between the gasket andthe other end mounting member.

[0227] Further, in the gasket in accordance with the fifth aspect of thepresent invention provided with the structure mentioned above, since themain body is made of the adhesive rubber and is integrally formed onboth faces of the end portion of the sheet-shaped gasket mounting memberby using the adhesive property of the adhesive rubber, the sheet-shapedgasket mounting member also serves as the effect of reinforcing thegasket main body, so that it is possible to restrict the deformation ofthe whole of the gasket comparatively small at a time of handling.Accordingly, it is possible to improve a handling property or assemblingworkability of the gasket. Further, since the gasket main body isintegrated with the sheet-shaped gasket mounting member and is bonded tothe other end mounting member via the sheet-shaped gasket mountingmember, it is not necessary to attach the other end mounting member tothe molding die at a time of molding the gasket main body. Accordingly,since there is no risk that any crack or the like is generated even inthe case that the other end mounting member is a material having lowstrength or a thin plate, it is possible to easily integrate the otherend mounting member with the gasket. Further, in the case that thesheet-shaped gasket mounting member attached to the molding die in placeof the other end mounting member is, for example, a resin film, sincethere is no risk that the crack or the like is generated in thissheet-shaped gasket mounting member, it is possible to set the moldclamping force large, so that it is possible to inhibit a lot of moldingburrs from being generated. Further, since the gasket main body isintegrally formed on both faces of the end portion of the sheet-shapedgasket mounting member, the both-face gasket is formed, and the gasketmain body is in direct contact with the other end mounting member, sothat it is possible to securely seal between the gasket and the otherend mounting member.

[0228] Further, in the gasket in accordance with the sixth aspect of thepresent invention provided with the structure mentioned above, since theadhesive agent is attached to one face of the sheet-shaped gasketmounting member and the mold releasing film is releasably attached tothe one face, it is possible to protect the adhesive agent by the moldreleasing film before the mounting work of the gasket, and it ispossible to mount the gasket to the other end mounting member inaccordance with a simple work only of peeling the mold releasing filmand positioning and pressing the gasket, at a time of the mounting work.

[0229] Further, in the gasket in accordance with the seventh aspect ofthe present invention provided with the structure mentioned above, sincethe adhesive agent is attached to one face of the sheet-shaped gasketmounting member and the mold releasing film is releasably attached tothe one face, it is possible to protect the adhesive agent by the moldreleasing film before the mounting work of the gasket, and it ispossible to mount the gasket to the other end mounting member inaccordance with a simple work only of peeling the mold releasing filmand positioning and pressing the gasket, at a time of the mounting work.Further, since the portion peeling the mold releasing film at a time ofthe mounting work is provided in some parts on the periphery of thegasket, and the peeling area and the sticking area are set small, thesticking work is made extremely easy.

[0230] Further, in the gasket in accordance with the eighth aspect ofthe present invention provided with the structure mentioned above, sincethe integral product of the rubber-only gasket main body and thesheet-shaped gasket mounting member provided in some parts on theperiphery of the gasket main body is formed, and the sheet-shaped gasketmounting member is provided with the sticking function on one facethereof, it is possible to mount the gasket to the other end mountingmember in accordance with the simple work only of positioning andpressing the gasket, at a time of the mounting work of the gasket.

[0231] Further, in the gasket in accordance with the ninth aspect of thepresent invention provided with the structure mentioned above, since thecross sectional shape of the gasket main body in accordance with theeighth aspect is formed in an O-ring shape, the gasket main body is indirect contact with the other end mounting member, so that it ispossible to effectively seal between the gasket and the other endmounting member. Accordingly, it is possible to obtain a high sealingproperty without depending on the material or the surface roughness ofthe other end mounting member, and it is possible to obtain a highsealing property even in the case that a small sealing effect isobtained only by the adhesive agent.

[0232] Further, in the gasket in accordance with the tenth aspect of thepresent invention provided with the structure mentioned above, since thecross sectional shape of the gasket main body in accordance with theeighth aspect is formed in the lip shape, the gasket main body is alsoin direct contact with the other end mounting member, so that it ispossible to effectively seal between the gasket and the other endmounting member. Accordingly, it is possible to obtain a high sealingproperty without depending on the material or the surface roughness ofthe other end mounting member, and it is possible to obtain a highsealing property even in the case that a small sealing effect isobtained only by the adhesive agent.

[0233] Further, in the gasket in accordance with the eleventh aspect orthe twelfth aspect of the present invention provided with the structurementioned above, since the gasket is provided with the gasket mainbodies for both faces arranged on both the faces of the other endmounting member, and the sheet-shaped gasket mounting member integratedwith the gasket main bodies for both faces, and the gasket is structuredsuch as to be bent in two at a time of being mounted to the other endmounting member so as to be stuck to both the faces of the other endmounting member, it is possible to manufacture and handle two gasketsrequired on both the faces of the other end mounting member in a stateof combining two gaskets into one piece, so that it is possible towidely reduce a number of man-hour and a cost for manufacturing. Inaddition, to this, in accordance with the thirteenth aspect, since theconnection portion of the sheet-shaped gasket mounting member isprovided with the bending position specifying portion such as a slit, aperforated line or the like, it is possible to easily bend theconnection portion at the specified portion. Still further, in each ofthe gaskets in accordance with the seventeenth aspect to the twentiethaspect of the present invention provided with the structure mentionedabove, the same operations and effects as those of the gasket inaccordance with the first aspect mentioned above can be achieved.Further, in addition, it is possible to prevent the surface pressurepeak value of the gasket main body from being lowered, even when theposition at which the gasket is stuck on both the faces of theelectrolyte membrane is slightly displaced.

What is claimed is:
 1. A gasket comprising: a sheet-shaped gasketmounting member provided with a sticking function on one face; and agasket main body made of a rubber-type elastic member integrated withsaid sheet-shaped gasket mounting member, wherein said gasket is mountedto the other end mounting member on the basis of the sticking functionof said sheet-shaped gasket mounting member.
 2. A gasket as claimed inclaim 1, wherein the gasket main body is integrally formed on anotherface of the sheet-shaped gasket mounting member by using an adhesiveagent.
 3. A gasket as claimed in claim 1, wherein the gasket main bodyis made of an adhesive rubber, and is integrally formed on another faceof the sheet-shaped gasket mounting member by using an adhesive propertythereof.
 4. A gasket as claimed in claim 1, wherein the gasket main bodyis integrally formed on both faces of an end portion of the sheet-shapedgasket mounting member by using an adhesive agent.
 5. A gasket asclaimed in claim 1, wherein the gasket main body is made of an adhesiverubber, and is integrally formed on both faces of an end portion of thesheet-shaped gasket mounting member by using an adhesive propertythereof.
 6. A gasket as claimed in claim 4 or 5, wherein the adhesiveagent is attached to one face of the sheet-shaped gasket mountingmember, a mold releasing film is releasably attached to one face, and aportion for peeling said mold releasing film at a time of the mountingwork is provided all around the periphery of the gasket main body.
 7. Agasket as claimed in claim 4 or 5, wherein the adhesive agent isattached to one face of the sheet-shaped gasket mounting member, a moldreleasing film is releasably attached to one face, and a portion forpeeling said mold releasing film at a time of the mounting work isprovided in parts on the periphery of the gasket main body.
 8. A gasketcomprising: a gasket main body made only of a rubber; and a sheet-shapedgasket mounting member provided in parts on a periphery of said gasketmain body, wherein said gasket is mounted to the other end mountingmember on the basis of a sticking function provided on one face of saidsheet-shaped gasket mounting member.
 9. A gasket as claimed in claim 8,wherein a cross sectional shape of the gasket main body is an O-ringshape.
 10. A gasket as claimed in claim 8, wherein a cross sectionalshape of the gasket main body is a lip shape.
 11. A gasket as claimed inany one of claims 1 to 10, wherein the gasket main body is a gasket mainbody for a both-face portion to be arranged on both faces of the otherend mounting member, the sheet-shaped gasket mounting member isintegrally formed in said gasket main body, and the gasket is bent intwo at a time of being mounted to said other end mounting member so asto be stuck to both faces of said other end mounting member.
 12. Agasket as claimed in claim 11, wherein the sheet-shaped gasket mountingmember integrally has a portion stuck to one face side, a portion stuckto another face side, and a connection portion connecting said bothportions of the other end mounting member, and is bent in saidconnection portion at a time of being mounted.
 13. A gasket as claimedin claim 12, wherein said connection portion is provided with a bendingposition specifying portion such as a slit, a perforated line or thelike for facilitating the bending of the connection portion.
 14. Agasket as claimed in any one of claims 1 to 13, wherein the other endmounting member is a separator for a fuel battery.
 15. A gasket asclaimed in any one of claims 1 to 13, wherein the other end mountingmember is a reaction electrode portion for a fuel battery, or anelectrolyte membrane corresponding to a component part of the reactionelectrode portion.
 16. A gasket as claimed in any one of claims 1 to 13,wherein the other end mounting member is a top cover for an HDD.
 17. Agasket as claimed in any one of claims 1 to 7, wherein said gasket isstuck to each of both faces of an electrolyte membrane for a fuelbattery, and two or more seal lips are provided in each of the gaskets.18. A gasket as claimed in any one of claims 1 to 7, wherein said gasketis stuck to each of both faces of an electrolyte membrane for a fuelbattery, and each of the gaskets is formed in a squeeze shape having noseal lip.
 19. A gasket as claimed in any one of claims 1 to 7, whereinsaid gasket is stuck to each of both faces of an electrolyte membranefor a fuel battery, one or more seal lip is provided in one gasket, andanother gasket is formed in a squeeze shape having no seal lip.
 20. Agasket as claimed in any one of claims 1 to 7, wherein said gasket isstuck to each of both faces of an electrolyte membrane for a fuelbattery, one seal lip is provided in one gasket, and two or more seallips are provided in another gasket.